The focus of this conference is on the design, fabrication, and application of micro/nanostructures that facilitate the generation, propagation, manipulation, and detection of light from the infrared to the ultraviolet. Papers are solicited on the following and related topics: ;
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Conference 11903

Nanophotonics and Micro/Nano Optics VII

In person: 11 - 12 October 2021
On demand now
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  • Poster Session
  • 1: 1D-Fiber/0D-Nanocrystals
  • 2: Resonator/Cavity
  • 3: Meta/2D Materials
  • 4: Silicon Photonics I
  • 5: Silicon Photonics II
  • 6: Silicon Photonics III
Poster Session
In person: 11 October 2021 • 13:00 - 14:30 China Standard Time
Conference attendees are invited to attend the poster session on Monday afternoon. Come view the posters, ask questions, and network with colleagues in your field. Authors of poster papers will be present to answer questions concerning their papers. Attendees are required to wear their conference registration badges to the poster session.

Poster Setup: Monday 10:00 to 13:00
View poster presentation guidelines and set-up instructions at
https://spie.org/PA/poster-presentation-instructions
11903-27
Author(s): Yaoxing Bian, Zhaona Wang, Beijing Normal Univ. (China)
On demand | Presented Live 11 October 2021
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Programmable random lasing pulses are highly desired due to their promising applications in information security, flexible encoding system, and smart imaging. However, the fixed random scattering configuration hinders their realization. Herein, a programmable random laser is proposed and fabricated based on the external waveguide-assisted random scattering feedback. The various pulse time series of random lasing can be flexibly realized by switching the adhesion/separation state between the gain and the destroyed waveguide structure and further be proposed to built dynamic optical barcodes and flexible information encryption system.The results may widely expand the application prospects of random lasers in the fields of optical data recording, dynamic security labels, smart sensing and flexible imaging.
11903-28
Author(s): Mengyin Liu, Hongyan Yang, Yupeng Chen, Guilin Univ. of Electronic Technology (China)
In person: 11 October 2021 • 13:00 - 14:30 China Standard Time
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In this paper, the SPR optical fiber sensor based on graphene coated gold nanotubes is designed. When the graphene coating N = 2, the maximum sensitivity reaches 6000 nm / RIU, and the figure of merit (FOM) is 152 RIU−1.
11903-29
Author(s): Xiao Weilai, Zhang Zan, Ling Xiaohui, Hengyang Normal Univ. (China)
On demand | Presented Live 11 October 2021
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We theoretically compare two kinds of spin-orbit interaction (SOI) systems in optics, one is that a light beam propagates along the optical axis in a uniaxial crystal, the other is that it normally reflectes/refractes by a sharp interface. We find that the vortex phases generated by these processes are wavevector-dependent Pancharatnam-Berry phases originating from the topological nature of the beam itself, while the Pancharatnam-Berry phase in an inhomogeneous anisotropic medium (e.g., Q-plates) is coordinate-dependent resulting from the anisotropy of the external materials. We further discuss the SOI efficiency of these systems, and propose several ways to enhance them.
11903-30
Author(s): Wanli Xie, Qingpeng Luo, Weijin Kong, Qingdao Univ. (China)
On demand | Presented Live 11 October 2021
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In practical applications, the linear to circular (LTC) polarization conversion of electromagnetic waves is of great significance. In this work, we designed a broadband high-efficiency reflective LTC polarization converter with temperature control in the visible range. Each periodic unit of the LTC polarization converter is composed of a gold mirror, a dielectric layer, a wide L-shaped gold plate and a narrow anti-L-shaped VO2 strip. The results show that the conversion efficiency can reach 0.9 in the visible range, and the switch of polarization converter can be controlled by VO2. The linear to circular polarization converter has potential applications in stealth technology, electromagnetic measurement.
11903-31
Author(s): Qingpeng Luo, Weijin Kong, Wanli Xie, Qingdao Univ. (China)
On demand | Presented Live 11 October 2021
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High performance absorber is desirable for solar energy, photo detection and optical interconnects. Here an active tunable graphene metamaterials quad-band absorber is theoretically demonstrated. The designed absorber has four higher than 97% absorption peaks in terahertz and infrared range. This absorber consists of a graphene layer, a silica substrate and a metal reflective surface. Simulation demonstrates that absorbance peak can be adjusted by changing geometric parameters of the periodic array structure or the Fermi level of the graphene. Such devices may have potential application in active plasmonic sensor, Light detection, photo thermal conversion and optoelectronic devices.
11903-32
Author(s): Aiqin Hu, Peking Univ. (China); Xiaolong Xu, Wei Liu, Peking University (China); Shengnan Xu, Tsinghua University (China); Zhaohang Xue, Peking Univ. (China); Bo Han, Shufeng Wang, Peng Gao, Peking University (China); Quan Sun, Hokkaido University (Japan); Qihuang Gong, Yu Ye, Peking University (China); Guowei Lu, Peking Univ. (China)
On demand | Presented Live 11 October 2021
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Fundamental dynamic processes at the electronic contact interface, such as carrier injection and transport, become pivotal and significantly affect device performance. Time-resolved photoemission electron microscopy (TR-PEEM) with high spatiotemporal resolution provides unprecedented abilities of imaging the electron dynamics at the interface. Here, we implement TR-PEEM to investigate the electron dynamics at a coplanar metallic 1T′-MoTe2/semiconducting 2H-MoTe2 heterojunction. We find the non-equilibrium electrons in the 1 T′-MoTe2 possess higher energy than those in the 2H-MoTe2. The nonequilibrium photoelectrons collapse and relax to the lower energy levels in the order of picoseconds. The photoexcited electrons transfer from 1 T′-MoTe2 to 2H-MoTe2 with at a rate of ~0.8 × 1012 s−1 (as fast as 1.25 ps). These findings contribute to our understanding of the behavior of photoexcited electrons in heterojunctions and the design of in-plane optoelectronic devices.
11903-33
Author(s): Xi Xie, Changjun Min, Haixiang Ma, Yuquan Zhang, Xiaocong Yuan, Shenzhen Univ. (China)
In person: 11 October 2021 • 13:00 - 14:30 China Standard Time
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Here, we propose and experimentally investigate a new method to accurately trap and dynamically manipulate single nanoparticle in optical surface wave tweezers. By tailoring the trapping potential wells formed by the surface wave, we achieve trapping of targeted single particle while all surrounding particles are repelled, and further dynamically manipulate the single particle movement by an SLM. We further prove that different samples, including gold nanoparticles and staphylococcus, can be accurately manipulated in our system. Our theoretical studies of optical force and potential well agree with the experimental results. This method is suitable for all surface wave tweezers.
11903-34
Author(s): Hao Lv, Hubei Engineering Univ. (China)
In person: 11 October 2021 • 13:00 - 14:30 China Standard Time
11903-35
Author(s): Pengfei Ma, Guangzhen Luo, Pengfei Wang, Jianbin Ma, Ruiting Wang, Zhengxia Yang, Xuliang Zhou, Jiaoqing Pan, Yejin Zhang, Institute of Semiconductors (China)
On demand | Presented Live 11 October 2021
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In this manuscript, a grating coupler based on SiN-Si dual-layer structure is proposed. It is composed of a layer of Si grating above the SiN waveguide layer. In the case of coupling from grating coupler to single-mode fiber, the highest coupling efficiency is about -1.07 dB, and the 1 dB bandwidth is over 100 nm. As to coupling from single-mode fiber to grating coupler, the highest coupling efficiency is about -2.53 dB, and the 1 dB bandwidth is about 65 nm. With the proposed grating coupler and SiN waveguide as bus waveguide, it is able to effectively reduce the coupling loss between the single-mode fiber and the chip, increase the working bandwidth, and achieve higher input power. With the proposed grating coupler, it is able to effectively reduce the coupling loss between the single-mode fiber and the chip, increase the working bandwidth, and achieve higher input power.
11903-36
Author(s): Lingling Zhang, Huifan He, Haoyuan Zhong, Fengtao Lu, Jinling Institute of Technology (China)
On demand | Presented Live 11 October 2021
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Optical metasurfaces are one of the most studied objects in the field of electromagnetism. However, designing optical metasurfaces to meet the desired transfer function is still very challenging. Genetic Algorithm (GA) is an optimization algorithm that simulates the process of inheritance and evolution of organisms in their natural environment. It’s able to perform crossover, mutation, evolution and other operations on many of these gene fragments and ultimately obtain the optimal genetic outcome. In this paper, the structural parameters are optimized by the transfer matrix method in combination with a genetic algorithm to achieve a nonlocal transfer function. As an example, we optimize the multilayer slabs to match the ideal second order differential transfer function and the simulation results confirm the computational capabilities of the device.
11903-37
Author(s): Qiangbo Zhang, Chang Wang, Yan Sun, Xinyu Liu, Zeqing Yu, Zhejiang Univ. (China); Fei Wu, LLVision Technology (China); Zhenrong Zheng, Zhejiang Univ. (China)
On demand | Presented Live 11 October 2021
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As novel planar structures, the metasurfaces exhibit the unprecedented capability to manipulate the amplitude, phase, and polarization of electromagnetic waves. Therefore, metasurface is designed to apply to metalens, holography, nanoprinting display, encryption, and so on. It is very interesting and meaningful work to integrate bifocal metalens and nanoprinting images into a single metasurface. A method is proposed to combine propagation phase and geometric phase, as well as Malus's law to realize the function of the bifocal metalens and clear nanoprinting display in the near field which can be observed at a certain polarization. This original design expands the functional integration of metasurface and improves applications in image displays, optical storage, augmented reality, virtual reality, and many other related fields.
11903-38
Author(s): Han Yang, Ruliang Wang, Rongxin Fu, Ya Su, Xue Lin, Xiangyu Jin, Wenli Du, Xiaohui Shan, Wenqi Lv, Guoliang Huang, Tsinghua Univ. (China)
In person: 11 October 2021 • 13:00 - 14:30 China Standard Time
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Both multimodal imaging systems with high registration accuracy and molecular agents with highly specific targeting capacity plays important roles in imaging-guided cancer therapy. Here, a novel simultaneous dual-modal imaging system combined with cancer cell membrane-coated nanoparticles as an imaging-guided photothermal therapy (PTT) was reported. The dual-modal imaging system is based on a self-developed dual-modal detector for simultaneous detection of high-energy X-ray and low-energy visible light. Cancer cell membrane-coated upconversion nanoparticles (CC-UCNPs) and gold nanoparticles (CC-AuNPs) possess the functions of immune evasion and active tumor targeting, demonstrating highly specific imaging and high-efficiency PTT therapy. Both in vitro and in vivo experimental results suggested the combination of our novel simultaneous dual-modal imaging and biomimetic UCNP/AuNP could be a promising dual-modal platform and methodology for cancer therapy.
11903-39
Author(s): Hua Liu, Quanxin Ding, Ronggang ZHU, Science and Technology on Electro-Optic Control Lab. (China)
On demand | Presented Live 11 October 2021
11903-40
Author(s): Ziang Gao, Shilin Yu, Yusen Wang, Tonggang Zhao, Beijing Univ. of Posts and Telecommunications (China)
On demand | Presented Live 11 October 2021
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Fano resonance with high Q-factor based on all dielectric metasurface is of great significance for the design of optical refractive index sensor. Herein, we proposed an all-dielectric metasurface structure based on silicon, which is composed of two circular holes and one hexagonal hole. The substrate is silica. Two schemes are put forward to achieve asymmetry structure: changing the radius of a circular hole and changing the circular hole into an elliptical hole. Both schemes can generate quasi-BIC mode. The transmission spectrum is calculated by finite difference time domain(FDTD) simulation software, and the maximum Q-factor can exceed 24000. At the same time, the extremely narrow linewidth of Fano resonance is utilized to design the optical refractive index sensors. The sensitivity can reach 273nm / RIU and figure of merit (FOM) is 2730.
11903-41
Author(s): Shilin Yu, Ziang Gao, Tonggang Zhao, Jianguo Yu, Beijing Univ. of Posts and Telecommunications (China)
On demand | Presented Live 11 October 2021
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Plasmon-Induced Transparency (PIT) is extended from the classical electromagnetically induced transparency (EIT), which has been a hotspot in recent years because of its potential applications in optical integrated devices. In this letter, multiple Plasmon-Induced Transparency (PIT) effects are achieved by periodically arranged rectangular resonators (RRs). The proposed structure is composed of metal-dielectric-mental (MDM) waveguide with a connected stub cavity and coupled RRs. Two RRs with the same parameters are placed vertically and seen as a periodic unit. New PITs arise one by one as new RRs are etched continually. The interesting phenomenon can be applied in optical devices.
11903-42
Author(s): Lei Gong, Haibin Wang, Jie Yu, Zhiqiang Yang, Lihong Yang, Liguo Wang, Xi'an Technological Univ. (China)
In person: 11 October 2021 • 13:00 - 14:30 China Standard Time
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During the preparation of optical films, each interface of the film system will deviate from the ideal shape of the smooth surface, and micro-roughness optical surface formed by random fluctuation of film thickness. With the rapid development of thin-film/semiconductor chip micro-nano periodic structures, periodic units and defect sizes are gradually approaching the nano-level, the influence of the roughness of the optical surface on the overall performance of the system cannot be ignored. Based on the three-dimensional FDTD/MRTD algorithm, the system studies the light field distribution characteristics of the surface of complex optical structures at the micro-nano scale.
11903-43
Author(s): Bin Li, Institute of Microelectronics (China)
In person: 11 October 2021 • 13:00 - 14:30 China Standard Time
11903-44
Author(s): Yan-Jun Qian, Yun-Feng Xiao, Peking Univ. (China)
In person: 11 October 2021 • 13:00 - 14:30 China Standard Time
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Chaotic dynamics in optical microcavities, governed dominantly by manifolds, is of great importance for both fundamental studies and photonic applications. Here, we report the experimental observation of a stable manifold characterized by energy and momentum evolution in the nearly chaotic phase space of an asymmetric optical microcavity. Specifically, the distribution of the stable manifold is visualized by the output power and the coupling depth to high-𝑄 modes extracted from the transmission spectra, which is consistent with theoretical predictions by the ray model. This work opens a new path to understand the chaotic dynamics and reconstruct the complex structure in phase space, providing a new paradigm of manipulating photons in wave chaos.
11903-45
Author(s): Fan Yang, Lu Li, Xin Cai, Jianjie Li, Jiahao Tao, Soochow Univ. (China); Yu Xu, Suzhou Institute of Nano-Tech and Nano-Bionics (China); Bing Cao, Soochow Univ. (China); Ke Xu, Suzhou Institute of Nano-Tech and Nano-Bionics (China)
On demand | Presented Live 11 October 2021
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As the size of micro-LED decreases, the sidewall damage caused by plasma etching becomes an important factor in reducing the luminescence efficiency. Here, the photoluminescence, cathodoluminescence and High‑resolution transmission electron microscopy (HR‑TEM) were combined to reveal physical defects on the sidewall surface, such as plasma-induced lattice disorder, and the destruction of the exposed part of the quantum well during etching. The structure of the 20um mesa after inductively coupled plasma (ICP) dry etching was characterized optically, and the luminescence intensity begins to decrease gradually at 4 μm from the sidewall, which was caused by the surface non-radiative recombination.
11903-46
Author(s): Guanglong He, Rui Ge, Hang Han, Jiayu Lv, Haochen Li, Qi Chen, Feiyan Li, Biao Zhang, Yue Fei, Xiaohan Wang, Hao Wang, LaBao Zhang, Xiaoqing Jia, Lin Kang, Peiheng Wu, Research Institute of Superconductor Electronics, Nanjing Univ. (China)
On demand | Presented Live 11 October 2021
11903-47
Author(s): Lingyao Yu, Yuan Jia, Jun Yin, Xujin Hu, Shaofei Wang, Hongyu Chen, Guilin Univ. of Electronic Technology (China)
In person: 11 October 2021 • 13:00 - 14:30 China Standard Time
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We present a non-invading optical method of a line-shape trapping beam manipulating micron particles. The linear trap could manipulate multiple particles along the straight line instead of the traditionally multiple point traps where the laser beam is either split into a few components focused at various points or scanned in the time-sharing/jumping manner. What’s more, the biological cell, commonly manipulated with multiple point traps could be more flexibly examined by the linear trap to obtain the mechanical property. It is indicated that the linear trap shows the promising application in measuring mechanical properties of soft matters and in mechanically screening the biological cells.
11903-48
Author(s): Xiaomeng Cheng, Yangyang Jing, Mingang Zhang, Xiangdong Xu, Univ. of Electronic Science and Technology of China (China)
On demand | Presented Live 11 October 2021
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In this work, we investigated the direct-growth and optical waveguide characteristics of DAST hydrate waveguides (DAST HWs). A simple and effective cooling soft template method was proposed to grow the DAST HWs without destroying the crystal structure and the optical properties. Particularly, under induced by surfactant and rapid cooling, ultra-long DAST HWs (5000 μm length) with high optical quality were successfully produced. The as-produced DAST HWs exhibit excellent waveguide performance, exciton polariton and fluorescence effects, which can be rationally controlled by the annealing temperature. These results will promote wide applications of DAST HWs in integrated optical modulation and optical waveguides. Notably, the simple soft template method not only improves the optical quality of DAST HWs, but also can be further extended to similar growth of other organic materials with D-π-A structures.
11903-49
Author(s): Zhen Chai, Beihang Univ. (China)
In person: 11 October 2021 • 13:00 - 14:30 China Standard Time
11903-50
Author(s): Yue Dong, Yu Liu, Yin Xu, Bo Zhang, Yi Ni, Jiangnan Univ. (China)
In person: 11 October 2021 • 13:00 - 14:30 China Standard Time
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In this study, we designed a broadband and high-extinction ratio (ER) TE-pass/TM-stop polarizer operating at 850 nm. The proposed polarizer is designed on silicon nitride (Si3N4) on insulator platform to achieve low loss operation at 850 nm wavelength region. In contrast to conventional polarizer structures, chirped sub-wavelength gratings (SWG) is introduced in the proposed device main body to extend wavelength band of the leakage mode. Owing to the broadband nature of leakage mode, the operating bandwidth, which defined as the wavelength region with ER higher than 20 dB, is increased dramatically. The simulation results show that a bandwidth broader than 170 nm is achieved with ER higher than 20 dB and IL smaller than 1dB over the wavelength region from 775 nm to 946 nm.
11903-51
Author(s): Fang Wu, Yang Bu, Fanchun Tang, Xiangzhao Wang, Shanghai Institute of Optics and Fine Mechanics (China)
On demand | Presented Live 11 October 2021
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Resolution is one of the key performances of the lithography tool. Decreasing the exposure wavelength and increasing the NA of the objective lens can enhance the resolution. Therefore, the exposure wavelength is reduced to deep ultraviolet, and a polarized illumination is adopted. The polarization effect of the exposure system seriously affects the imaging quality. The polarization parameters must be measured accurately. Due to the grating polarizer's compactness and wide acceptance angle, it is introduced to the polarization measurement. A bilayer metallic grating polarizer with tapered slits is designed. The physical mechanism of transmission enhancement on TE-polarized light and transmission suppression on TM-polarized light have been analyzed. For the designed grating polarizer with tapered slits, the transmission of TE-polarized light is 59.4%, and the extinction ratio is 75dB at normal incidence.
11903-52
Author(s): Yusen Wang, Zonghai Hu, Tonggang Zhao, Shilin Yu, Ziang Gao, Beijing Univ. of Posts and Telecommunications (China)
On demand | Presented Live 11 October 2021
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Fano resonance can be used to realize high Q-factor resonators in meta-surfaces with excellent performance. In this work, we designed such high Q-factor resonators based on the bound states in the continuum (BIC) and quasi-BIC theory. By using different materials to break the permittivity-symmetry, there is a newly-generated sharp Fano peak with ultra-high Q-factor arising from the interference between the sub-radiant modes and the magnetic dipole resonance modes. The maximal Q-factor reaches 2.85E4. This ultra-high Q-factor resonator can be applied as a polarization switch.
11903-53
Author(s): Shaozhe Song, Shilin Yu, Hao Li, Tonggang Zhao, Beijing Univ. of Posts and Telecommunications (China)
On demand | Presented Live 11 October 2021
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An all-dielectric metasurface structure, composed of triple silicon strip arrayed on silica substrate, is proposed in this letter. Simulation results show that multiple Fano resonances arise in the transmission spectrum, performing high-quality (Q)-factor and nearly 100% modulation depth. The sensing performances of the proposed structure are investigated as well, yielding the refractive index sensitivity (S) of ~ 350 nm/RIU and maximum figure of merit (FOM) of ~ 56.7 RIU^-1. It is believed that the designed structure can provide some inspirations for the applications in nonlinear optics, optical modulations, lasing and biochemical sensing.
11903-55
Author(s): Pawaphat Jaturaphagorn, Papichaya Chaisakul, Kasetsart Univ. (Thailand)
On demand
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Research on mid-IR silicon-based waveguides has recently received strong interest. This paper focuses on optical integration between a broadband LED mid-infrared light source and micro-scale optical waveguide. The optical coupling scheme is crucial for the exploitation of LED light sources in waveguide-based spectroscopic sensing applications. Optical simulations based on Eigen Mode Expansion (EME) and FDTD methods is used to obtain approximate and optimized parameters. The sensitivity of the optical sensors will be evaluated with respected to the required optical power at the optical sources. The ability to efficiently couple light from a LED light source into a micron-scale waveguide could be beneficial for a wide range of application that is cost-sensitive.
Session 1: 1D-Fiber/0D-Nanocrystals
In person: 11 October 2021 • 14:30 - 14:50 China Standard Time
Session Chairs: Limin Tong, Zhejiang Univ. (China), Xiaoshun Jiang, Nanjing Univ. (China)
11903-1
Author(s): Ning Wang, Westlake Univ. (China); Matthias Zeisberger, Uwe Hübner, Markus Schmidt, Leibniz-Institut für Photonische Technologien e.V. (Germany)
In person: 11 October 2021 • 14:30 - 14:50 China Standard Time
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Here we report on a significant improvement of fiber-based light-coupling efficiencies at extremely large incident angles (from 30° to 85°) working in a large spectral range (550 nm to 1650 nm). We create gold nanodot arrays on the end-face of single-mode fibers (SMF-28) by electron-beam lithography, and measure the corresponding incoupling efficiencies under various experimental circumstances (angles, wavelengths, lattice constants, and polarization). The experimental data reveals that the nanostructure-enhanced fiber yields several orders of enhancement compared to its bare counterpart especially at incident angles > 30°. Besides the maximum value at normal incidence, a secondary efficiency enhancement situated between 40° and 60° is observed reaching values of the order of 10^-4 regardless of incidence polarizations. To conclude, we strongly believe that our concept paves the way towards high-performance fiber-based photonic devices.
11903-2
Author(s): Yu Wang, Ragini Singh, Bingyuan Zhang, Santosh Kumar, Liaocheng Univ. (China)
On demand
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In this paper, localized surface plasmon resonance (LSPR) based tapered multimode optical fiber (TMMF) sensor is developed for the detection of different concentrations of p-cresol solutions. Gold nanoparticles (AuNPs) and molybdenum disulfide nanoparticles (MoS2-NPs) were immobilized on TMMF probes, respectively. The performance of the designed probe was explored by detecting the response of different concentrations of p-cresol solutions. The combination of AuNPs and MoS2-NPs enhances the sensitivity and anti-interference ability of the sensing probe. In this work, the enzymatic reaction of p-cresol solution and tyrosinase changes the RI in the vicinity of the probe and records the corresponding spectrum. The probe will also be evaluated in terms of linear range, limit of detection (LoD), reproducibility, stability, selectivity, etc.
11903-3
Author(s): Worakit Naewthong, Waridsaraporn Jantapo, Atcha Kopwitthaya, National Electronics and Computer Technology Ctr. (Thailand)
On demand
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Lead halide nanocrystals are known as high photoluminescence quantum yield materials; however, their toxicity is still major concern. In this report, we proposed the synthesis protocol for copper halide nanocrystal using ligand-assisted reprecipitation (LARP) together with cooling process. The reprecipitation of cations (Rb+ and Cu+) with anion (Cl-) were occurred in the presence of oleic acid ligand while the solution was cooled down from temperature at 135C to room temperature. We observed white precipitation within 30 min. Upon characterization, we found spherical nanoparticles with 6.16 ± 1.2 nm in diameter. Although the X-Ray diffraction reveals two major structures including rubidium copper chloride (Rb2CuCl3) and rubidium copper chloride hydrate (Rb2CuCl4.2H2O), they exhibit extremely bright photoluminescence emission peak at 392 and 398 nm under 286 nm excitation. Our finding demonstrates the next-generation light emitting material in term of low toxicity and bright emission.
Session 2: Resonator/Cavity
In person: 11 October 2021 • 14:50 - 15:30 China Standard Time
Session Chairs: Xiaoshun Jiang, Nanjing Univ. (China), Pan Wang, Zhejiang Univ. (China)
11903-4
Author(s): Renjie Li, Xiaozhe Gu, The Chinese Univ. of Hong Kong, Shenzhen (China); Ke Li, Zhen Li, The Chinese Univ. of Hong Kong (China); Zhaoyu Zhang, The Chinese Univ. of Hong Kong, Shenzhen (China)
On demand | Presented Live 11 October 2021
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A Deep Learning (DL) based approach has been proposed to accurately model the relationship between design parameters and the Q factor and modal volume V of Photonic Crystal (PC) nanocavities. A Convolutional Neural Network (CNN), which consists of two convolutional layers and two fully-connected layers is trained on a large-scale dataset consisting of 12,500 nanocavities. The experimental results show that the CNN is able to achieve a state-of-the-art performance in terms of prediction accuracy (i.e., up to 99.9996%) and convergence speed (i.e., orders-of-magnitude speedup). The proposed approach overcomes shortcomings of existing methods and paves the way for DL-based on-demand and data-driven optimization of PC nanocavities applicable to the rapid design of nanoscale lasers and integrated photonic devices.
11903-5
Author(s): Yu Xie, Pan Wang, Xin Guo, Limin Tong, Zhejiang Univ. (China)
In person: 11 October 2021 • 15:10 - 15:30 China Standard Time
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We demonstrate a simple and cost-effective approach for batch fabrication of high-quality As2S3 and As2Se3 microsphere resonators (with eccentricities as low as ~0.13%). As-fabricated ChG microspheres show excellent resonant responses both in the near- and mid-IR spectral ranges (Q factor of ~10^6 around 1550 nm, and ~10^4 around 4.5 µm), providing a versatile platform for the exploitation of fundamental studies (e.g., optical nonlinearity, cavity quantum electrodynamics, etc.) in the near- and mid-IR regions, and are attractive for practical applications including optical sensing, microlasers, and microscopic imaging.
11903-6
Author(s): Pankaj Rajesh Kumar, Hardik Vyas, Ravi S. Hegde, Indian Institute of Technology Gandhinagar (India)
On demand
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Plasmonics suffers from high metal loss, heat generation, and incompatibility with CMOS fabrication processes. Dielectric nanoparticles are ideal candidates for creating high-performance nanoantennas due to their unique optical characteristics. Our work examined different geometries of Si nanodisks- single asymmetric, chain symmetric, single symmetric with varying emitter positions. A Purcell factor of 2000 was obtained using three slotted nanodisks. Introducing asymmetry by shifting the slot position of the nanodisk can further increase the Purcell factor. Novel nanoantenna designs with CMOS-compatibility for fluorescence signal amplification in biochemical applications, electrical excitation of quantum emitters could result from our research.
Break
Tea/Coffee Break 15:30 - 16:00
Session 3: Meta/2D Materials
In person: 11 October 2021 • 16:00 - 17:00 China Standard Time
Session Chairs: Pan Wang, Zhejiang Univ. (China), Limin Tong, Zhejiang Univ. (China)
11903-7
Author(s): Songzhi Wang, Leiming Zhou, Ruiyu Luo, Yuxi Xiao, Wei Zhang, Zhili Wang, Jigang Hu, Hefei Univ. of Technology (China); Qiwen Zhan, Univ. of Shanghai for Science and Technology (China)
On demand | Presented Live 11 October 2021
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In this work, high resonant reflection of light has been investigated in an atomic thickness resonator consisting of monolayer graphene nanosquare arrays at mid-infrared frequencies. Our numerical results show that more than 90% light reflectivity can be realized due to excitation of dipole resonance in the gap of graphene arrays in this system. Moreover, it is found the high resonant reflection is nearly independent of polarization over a wide-angle range. The resonant wavelength can be dynamically modulated by changing the geometry of the structure or adjusting the graphene chemical potential. Our findings provide new opportunities for the development of optical reflective devices, nano-antenna and highly integrated devices with atomic thickness.
11903-8
Author(s): Qun Xie, Linhui Guo, Zexuan Zhang, Weijin Kong, Maojin Yun, Qingdao Univ. (China)
In person: 11 October 2021 • 16:20 - 16:40 China Standard Time
11903-9
Author(s): Linhui Guo, Qun Xie, Zexuan Zhang, Weijin Kong, Maojin Yun, Qingdao Univ. (China)
In person: 11 October 2021 • 16:40 - 17:00 China Standard Time
11903-10
Author(s): Hardik.S. Vyas, Devdutt Tripathi, Ravi S. Hegde, IIT Gandhinagar (India)
On demand
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Phase change metasurfaces are an exciting new platform for realizing a plethora of applications requiring tunability such as dynamic color filtering and displays, motionless beam scanning, and optical multi-bit memory elements. Reconfigurability in metasurfaces can be achieved by using phase change materials such as GeSeTe, which possess large refractive index contrast and rapid phase switching properties. In this work, we consider simple and dimerized one-dimensional gratings of GST225 and numerically study phase switching as a function of reconfiguration pulse intensity with the objective of minimizing reconfiguration threshold and maximizing the figure of merit (defined as the rate of change of reflection contrast in % to change in pulse intensity beyond the reconfiguration threshold). This work hopes to provide insights into the reconfiguration dynamics of PCM gratings while scaling down the reconfiguration threshold intensity requirements.
Session 4: Silicon Photonics I
In person: 12 October 2021 • 09:00 - 10:20 China Standard Time
Session Chairs: Limin Tong, Zhejiang Univ. (China), Xiaoshun Jiang, Nanjing Univ. (China)
11903-12
Author(s): Qi Huixin, Xiaoyong Hu, Peking Univ. (China)
In person: 12 October 2021 • 09:00 - 09:20 China Standard Time
11903-13
Author(s): Zhe Xu, Inspur Beijing Electronic Information Industry Co., Ltd. (China)
On demand | Presented Live 12 October 2021
11903-14
Author(s): Guangzhen Luo, Institute of Semiconductors (China), Ctr. of Materials Science and Optoelectronics Engineering, Univ. of Chinese Academy of Sciences (China); Pengfei Ma, Jianbin Ma, Ruiting Wang, Hongyan Yu, Xuliang Zhou, Pengfei Wang, Yejin Zhang, Jiaoqing Pan, Institute of Semiconductors (China)
On demand | Presented Live 12 October 2021
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We propose a beam scanner based on an on-chip 1×100 micro-ring optical switch array. By adopting a combination of optical switch array and lens, it can achieve beam steering. It uses a simple control circuit to achieve fast beam scanning. The simulation shows that its emission efficiency exceeds 95%, which is conducive to long-distance scanning and detection. All the components of this scanner can be fabricated on SOI substrate except for the optical lens, so its cost is low and the overall size of the device can be greatly reduced .In addition, since there are no moving parts in our scanner, it has advantages in performance and service life compared with mechanical beam steering devices. These advantages make our scanner is promising in light detection and ranging (LiDAR) field and free space optical communication field.
11903-15
Author(s): Kun Liao, Peking Univ. (China)
In person: 12 October 2021 • 10:00 - 10:20 China Standard Time
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Integrated photonics adopting photons as information carriers with multiple degrees of freedom could reach a high computational efficiency. Here, we proposed and experimentally demonstrated an nanophotnic convolver based on silicon metasurface by utilizing GA of inverse design, making the concurrent optimization under dual wavelengths more efficient. This proposal has the potential of being further extended to deal with more complex computing tasks using wavelength multiplexing. Besides, we reported a new all-optical computing framework to realize ultrafast and ultralow-energy-consumption all-optical computing based on convolutional neural networks. Multiple functions were experimentally implemented to validate the performance in practical application of the generic device concept. This work paves a new way for on-chip all-optical computing.
11903-16
Author(s): Yuri Grinberg, Muhammad Al-Digeil, National Research Council Canada (Canada); Daniele Melati, Ctr. de Nanosciences et de Nanotechnologies (France); Mohsen Kamandar Dezfouli, Jens H. Schmid, Pavel Cheben, Siegfried Janz, Dan-Xia Xu, National Research Council Canada (Canada)
On demand
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Design of integrated nanophotonic components requires increasingly sophisticated optical simulation and optimization tools. Encountering progressively large number of parameters, it becomes computationally challenging to explore the full design space in a reasonable time frame. We present our recently developed approach that leverages dimensionality reduction - one of the areas in machine learning – to identify and efficiently represent only the most relevant portion of the design space. Mapping and optimization in the reduced space can often be achieved several orders of magnitude faster than in the original space. We demonstrate the use of linear and non-linear dimensionality reduction methods in the context of several design examples of integrated silicon photonic components.
Break
Tea/Coffee Break 10:20 - 10:50
Session 5: Silicon Photonics II
In person: 12 October 2021 • 10:50 - 11:50 China Standard Time
Session Chairs: Xiaoshun Jiang, Nanjing Univ. (China), Pan Wang, Zhejiang Univ. (China)
11903-18
Author(s): Zexuan Zhang, Qun Xie, Linhui Guo, Weijin Kong, Maojin Yun, Qingdao Univ. (China)
In person: 12 October 2021 • 10:50 - 11:10 China Standard Time
11903-19
Author(s): Ding Zuoqin, Yaocheng Shi, Zhejiang Univ. (China)
On demand | Presented Live 12 October 2021
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A single photonic crystal nanobeam cavity (PCNC) supporting both high-order air and dielectric modes was firstly proposed for on-chip dual-parameter sensing. Due to the different field distributions of the two modes, they have quite different response to ambient refractive index and temperature variations. The geometrical parameters of the PCNC were optimized to achieve a suitable bandgap as well as make the wavelength locate at the commonly used wavelength band. The proposed PCNC shows a refractive index sensitivity of 172.5 nm/RIU (refractive index unit) and a temperature sensitivity of 47.4 pm/K for the air mode, while a refractive index sensitivity of 145.5 nm/RIU and a temperature sensitivity of 54.1 pm/K for the dielectric mode. The footprint of the sensing unit is only 0.8×7.6 μm2.
11903-20
Author(s): Liyu Lin, Gaopeng Xue, Junhao Zhu, Qihang Zhai, Qian Zhou, Kai Ni, Xiaohao Wang, Xinghui Li, Tsinghua Univ. (China)
In person: 12 October 2021 • 11:30 - 11:50 China Standard Time
Break
Lunch Break 11:50 - 13:30
Session 6: Silicon Photonics III
In person: 12 October 2021 • 13:30 - 15:50 China Standard Time
Session Chairs: Pan Wang, Zhejiang Univ. (China), Limin Tong, Zhejiang Univ. (China)
11903-22
Author(s): Li-hua Ye, Qing Zhao, Shaoqiang Hong, Southeast Univ. (China)
In person: 12 October 2021 • 13:30 - 13:50 China Standard Time
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Compared with traditional laser, the random laser has a similar working principle, but the laser mode is determined by multiple scattering, and random lasing does not require a resonant cavity. The multiple scattering increases the optical path length of the photon in the gain medium. When the gain of the photon is greater than the loss in a certain mode, the random lasing is achieved. The CdSe/ZnS quantum dots (QDs) with a type-I band alignment use ZnS shell to inorganic passivate CdSe core, which improves the optical properties and photochemical stability. As a functional material, polymer is usually used to form a waveguide structure doped with a gain medium. The polymer doped with CdSe/ZnS QDs is beneficial for random laser emission with low laser threshold, high color purity, and good environmental stability. In this paper, the enhancement effect of surface plasmon resonance of Ag nanoislands on random laser is studied on polymethyl methacrylate (PMMA) doped with CdSe/ZnS QDs.
11903-23
Author(s): Minghua Zhuge, Qinghai Song, Harbin Institute of Technology (China)
In person: 12 October 2021 • 13:50 - 14:10 China Standard Time
11903-24
Author(s): Yutai Chen, Junbo Yang, Xin Li, National Univ. of Defense Technology (China)
In person: 12 October 2021 • 14:10 - 14:30 China Standard Time
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The structural color generated by micro nano structure has more and more uses,such as nano art, anti-counterfeiting, information storage and so on. Here,we fabricate silicon nanostructures that exhibit localized magnetic and electric dipole resonances on a silicon substrate coated with a Si3N4 index matching layer to generate the structural color。Then according to its characteristics that different structure will produce different color,we finally make a Ba Yi pattern by using the CMOS technology.
11903-25
Author(s): Baohua Zhu, Henan Univ. (China); Fangfang Wang, The Shanghai Institute of Technical Physics (China); Xingping Ma, Yuzong Gu, Henan Univ. (China)
In person: 12 October 2021 • 14:30 - 14:50 China Standard Time
11903-56
Author(s): Xiaoshun Jiang, Nanjing Univ. (China)
In person: 12 October 2021 • 14:50 - 15:20 China Standard Time
11903-57
Author(s): Pan Wang, Zhejiang Univ. (China)
In person: 12 October 2021 • 15:20 - 15:50 China Standard Time
Conference Chair
Peking Univ. (China)
Conference Chair
Massachusetts Institute of Technology (United States)
Conference Chair
Zhejiang Univ. (China)
Program Committee
Univ. Paris-Saclay (France)
Program Committee
Zhejiang Univ. (China)
Program Committee
Georgia Institute of Technology (United States)
Program Committee
NTT Device Technology Labs. (Japan)
Program Committee
Min Gu
Univ. of Shanghai for Science and Technology (China)
Program Committee
Peking Univ. (China)
Program Committee
National Taiwan Univ. (Taiwan, China)
Program Committee
National Taiwan Univ. (Taiwan, China)
Program Committee
Nanjing Univ. (China)
Program Committee
Massachusetts Institute of Technology (United States)
Program Committee
Takahiro Nakamura
Photonics Electronics Technology Research Association (PETRA) (Japan)
Program Committee
Hong Kong Univ. of Science and Technology (Hong Kong, China)
Program Committee
Intel Corp. (United States)
Program Committee
Shanghai Jiao Tong Univ. (China)
Program Committee
The Chinese Univ. of Hong Kong (Hong Kong, China)
Program Committee
Peking Univ. (China)
Program Committee
National Research Council Canada (Canada)
Program Committee
National Institute of Advanced Industrial Science and Technology (Japan)
Program Committee
Zhejiang Univ. (China)
Program Committee
Guilin Univ. of Electronic Technology (China)
Program Committee
Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences (China)
Program Committee
The Univ. of Texas at Arlington (United States)
Additional Information

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  • Notification of acceptance by 6-September

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