In progress – view active session
Conference 13026
Next-Generation Spectroscopic Technologies XVI
22 - 23 April 2024 | National Harbor 4
View Session 
Session 1:
New Spectroscopic Technologies I
22 April 2024 • 8:10 AM - 10:00 AM EDT | National Harbor 4
Session Chair:
Luisa T. M. Profeta, Rigaku Analytical Devices (United States)
13026-1
22 April 2024 • 8:10 AM - 8:40 AM EDT | National Harbor 4
Show Abstract +
The mid-infrared spectral range plays an increasingly important role in harnessing applications ranging from biodiagnostics to in-vivo sensing and food safety. This has led to the evolution of mid-infrared photonics from an emerging technology to an enabling tool in routine use catering to a wide range of real-world scenarios.
Applications ranging from non-invasive exhaled breath analysis to the in-vivo assessment of cartilage damage or the detection of mycotoxins in food and feed confirm mid-infrared (MIR; 3-20 μm) photonics among the most flexible molecular sensing platforms nowadays available. This development has been catalyzed by the emergence of quantum and interband cascade laser (QCL, ICL) and LED technology providing miniaturized laser light sources based on quantum heterostructures that may be combined with frequency-matched waveguides/transducers for on-chip hybridization and/or integration toward IR-lab-on-chip systems.
Show Abstract +
For decades, TeraFETs have been used as THz and sub-THz detectors competing with commercial Schottky diode-based technology. More recently, short channel TeraFETs have been explored for THz vector detection measuring both the intensity and phase of the impinging THz or sub-THz radiation. We report on using TeraFETs as spectrometers, line-of-sight detectors, and frequency-to-digital converters. These applications use a single TeraFET excited at the gate-to-source and drain-to-source inputs, current-driven TeraFETs, or traveling wave multistage TeraFET amplifiers. Feeding the phase-shifted THz signals into the gate and source terminals of multi-stage TeraFET amplifiers greatly improves the response of the TeraFET spectrometer and enables the implementation of the frequency-to-digital converter using TeraFETs.
13026-3
On demand | Presented live 22 April 2024
Show Abstract +
We present a multi-octave, mid-IR (MIR) supercontinuum source spanning from 3.6 µm and extending into long-wave infrared region out to 11 µm with an exceptionally high conversion efficiency of 8.2% and output power of 39 mW. These results were enabled by intra-pulse difference frequency generation involving a femtosecond Thulium doped fiber laser, an indium fluoride fiber and a zinc gallium phosphide (ZGP) crystal. The nanojoule pulses from an all-fiber Thulium doped femtosecond laser source at ~ 2.2 μm were spectrally broadened in an in-house indium fluoride fiber to generate few-cycle pulses which served as a pump for ZGP. The output spectrum from the laser, including the unconverted pump covers more than three octaves of bandwidth from 1.3 um to 11 um. A record conversion efficiency obtained with an all-fiber pump and commercially available crystal presents an opportunity to bring a compact MIR light source to the market.
Show Abstract +
An on-chip polarization spectrometer is designed, fabricated, and characterized. Compared to the polarization-insensitive design, no extra photodetectors were needed with the use of elliptically-shaped nanostructured gallium nitride photodetectors. Deep-learning based spectral reconstruction is also demonstrated to significantly reduce the comptuation resource needs.
13026-5
On demand | Presented live 22 April 2024
Show Abstract +
Continuous progress in science, technology, and clean environmental regulations for energy requires low-power chip scale devices in sensing applications. Conventional trace gas sensing in the mid-infrared region is highly sensitive. However, it requires a complex optomechanical setup that may not be suitable for wide-area deployments. This paper shows the development of new waveguide materials for near and mid-infrared silicon photonics ranging from 0.7 to 10 mm. These include amorphous semiconductors like Chalcogenide Glasses (ChGs) of Germanium-Selenium-Silicon (Ge-Se-S) elements with different compositions. UV-Vis measurements show the optical energy gap between 1.6 eV with high Se concentration to 3.8 eV, where Se is replaced by S in the compositions. ATR-FTIR measurements show a high transmission spectrum ranging from 4000 to 400 cm-1. We show the optical properties of such thin film materials in the broadband range of mid-infrared, suitable for fabricating waveguides and micro-resonator cavities for on-chip sensing applications.
Break
Coffee Break 10:00 AM - 10:30 AM
Session 2:
New Spectroscopic Technologies II
22 April 2024 • 10:30 AM - 11:40 AM EDT | National Harbor 4
Session Chair:
Richard A. Crocombe, Crocombe Spectroscopic Consulting, LLC (United States)
13026-6
Evaluation of compact spectroscopic sensors in the NIR wavelength range for quality control and material analysis
(Invited Paper)
On demand | Presented live 22 April 2024
Show Abstract +
Spectral sensing technology has rapidly evolved in recent years, with compact spectral sensors emerging as powerful tools for quality control and material analysis across diverse industrial and scientific domains. We evaluate two state-of-the-art spectral sensors: from Senorics (1200-1700nm, 16 channel) and from ams_OSRAM (750-1050nm, 61 channel). This comparative analysis highlights strengths and limitations, aiding end-users, researchers, and engineers in sensor selection for specific applications. Emphasizing quality control and material analysis, we highlight these sensors' transformative role in enhancing efficiency, non-destructive material analysis, and industry standard compliance. This research contributes to the understanding of their potential across applications, fostering more efficient, reliable, and sustainable processes across industries.
13026-7
22 April 2024 • 11:00 AM - 11:20 AM EDT | National Harbor 4
Show Abstract +
Fourier Transform Near-Infrared (FT-NIR) spectroscopy, a powerful and versatile analytical technique, has found significant applications in Process Analysis technology. This non-invasive and rapid method harnesses the principles of near-infrared light absorption to deliver real-time insights into chemical composition, molecular structure, and physical properties of substances in a wide range of industrial processes. By virtue of its precision and adaptability, new Ethernet interface, the FT-NIR enables enhanced process control, quality assurance, and optimization across various industries, including pharmaceuticals, petrochemicals, food and beverage, and environmental monitoring. “
13026-9
On demand | Presented live 22 April 2024
Show Abstract +
Quantum Dots (QDs) [1] have been receiving significant attention due to their scientific interest (e.g., they were awarded the Nobel Prize in Chemistry last year) or their technological applications (e.g., television displays). Furthermore, many researchers find it intellectually appealing to work with Nobel Prize winning ideas. In this paper, the application of Quantum Dots (primarily) for detection of metal ions in water samples or in biological samples (e.g., blood syrum) will be described in detail and future directions will be discussed.
[1] V. Karanassios, Brief Introduction to Nanoscience and Nanotechnology (using Quantum Dots as an example), V. Karanassios (Invited), Open (https://www.academia.edu/69804589/Brief_Introduction_to_Nanoscience_and_Nanotechnology), Nanoscience Journal, Volume 1(1): 1-6 (2018)
Break
Lunch Break 11:40 AM - 1:40 PM
Session 3:
New Spectroscopic Technologies III
22 April 2024 • 1:40 PM - 2:40 PM EDT | National Harbor 4
Session Chair:
Luisa T. M. Profeta, Rigaku Analytical Devices (United States)
13026-11
22 April 2024 • 1:40 PM - 2:00 PM EDT | National Harbor 4
Show Abstract +
Terahertz plasmonic surface waves have attracted enormous attention even since the observation of extraordinary transmission of the terahertz waves in a periodic metallic array of subwavelength apertures. Quantitative analysis of the near-field behavior and contribution of surface plasmons to the transmission enhancement still remains challenging. By use of near-field scanning terahertz microscopy and numerical simulation, we study launching, propagation, and focusing of plasmonic surface waves with an ultimate goal of in-depth understanding the near-field characteristics of plasmonic terahertz surfaces waves.
Show Abstract +
Design considerations and technical challenges of a Sagnac-Fourier-Spectrometer (SAFOS) are reported, which is a Sagnac interferometer with a transmission grating added in the common beam path. This causes two diffracted wave fronts propagating in opposite directions along a common path. If the tilt of the wave fronts is chosen appropriately, they will form a Fizeau fringe pattern in the output arm. Via the spatial frequencies, this interferogram contains spectral information heterodyned around a central wavelength.
13026-13
On demand | Presented live 22 April 2024
Show Abstract +
We present recent development of an eye-safe, invisible, stand-off technique for the detection of target chemicals (such as explosives) in a single “snapshot” frame. Broadband Fabry-Perot quantum cascade lasers (FP-QCLs) in the wavelength range of 8 to 12 microns, are directed to a target several meters away. The “backscatter” and absorbance signals from target chemicals are spectrally extracted by an LWIR spatial heterodyne spectrometer (SHS). The SHS spectroscopic method offers full spectral coverage in each frame from an IR array. This presentation will cover the implementation and optimization of FP-QCLs for this broadband spectroscopic application. We will also discuss the collection and processing of SHS images to extract spectral information. Finally, we present results of measurements using specific analytes to demonstrate the application of the method to single frame stand-off detection of targets such as explosives and other chemical threats.
Break
Coffee Break 2:40 PM - 3:10 PM
Session 4:
New Spectroscopic Applications I
22 April 2024 • 3:10 PM - 4:00 PM EDT | National Harbor 4
Session Chair:
Luisa T. M. Profeta, Rigaku Analytical Devices (United States)
13026-14
Mid infrared spectroscopy applications using quantum cascade lasers for the identification of microplastic contaminants in aqueous solution
(Invited Paper)
22 April 2024 • 3:10 PM - 3:40 PM EDT | National Harbor 4
Show Abstract +
Quantum Cascade Lasers (QCLs) provide a high-power, tunable source of coherent light at wavelengths from 3-12 microns. Light in this band excites vibrational modes of many molecules of interest across widely diverse fields of interest. Spectroscopic instruments using QCLs have the capability to make breakthrough observations across multiple disciplines. We discuss the technical capability of these laser sources as well as their instrumentalized imaging and liquid-phase detection systems. We review the recent applications of QCL-based spectroscopy using standalone compact laser sources, packaged liquid-phase spectrometers, and mid-IR microscopes. In particular, we focus on a recent application of QCL-based IR microscopes to quantify microplastics in water and identify the plastic type of each particle using hyperspectral imaging. We show that QCL-based IR hyperspectral imaging can detect particles <20 um in diameter and can differentiate between different plastic materials with high accuracy.
13026-17
On demand | Presented live 22 April 2024
Show Abstract +
Graphene (a 2D nano-material) is extensively studied for use as an electronic material. More recently, functionalized graphene (either positively charged or negatively charged) has been used for analytical purposes, in particular, for chemical speciation studies. In this paper, such studies will be described in some detail and future work will be outlined.
Symposium Plenary
22 April 2024 • 5:00 PM - 6:30 PM EDT | Potomac A
Session Chairs:
Tien Pham, The MITRE Corp. (United States), Douglas R. Droege, L3Harris Technologies, Inc. (United States)
View Full Details: spie.org/dcs/symposium-plenary
Chair welcome and introduction
22 April 2024 • 5:00 PM - 5:05 PM EDT
DoD's microelectronics for the defense and commercial sensing ecosystem (Plenary Presentation)
Presenter(s): Dev Shenoy, Principal Director for Microelectronics, Office of the Under Secretary of Defense for Research and Engineering (United States)
22 April 2024 • 5:05 PM - 5:45 PM EDT
NATO DIANA: a case study for reimagining defence innovation (Plenary Presentation)
Presenter(s): Deeph Chana, Managing Director, NATO Defence Innovation Accelerator for the North Atlantic (DIANA) (United Kingdom)
22 April 2024 • 5:50 PM - 6:30 PM EDT
Symposium Panel on Microelectronics Commercial Crossover
23 April 2024 • 8:30 AM - 10:00 AM EDT | Potomac A
View Full Details: spie.org/dcs/symposium-panel
The CHIPS Act Microelectronics Commons network is accelerating the pace of microelectronics technology development in the U.S. This panel discussion will explore opportunities for crossover from commercial technology into DoD systems and applications, discussing what emerging commercial microelectronics technologies could be most impactful on photonics and sensors and how the DoD might best leverage commercial innovations in microelectronics.
Moderator:
John Pellegrino, Electro-Optical Systems Lab., Georgia Tech Research Institute (retired) (United States)
Panelists:
Shamik Das, The MITRE Corporation (United States)
Erin Gawron-Hyla, OUSD (R&E) (United States)
Carl McCants, Defense Advanced Research Projects Agency (United States)
Kyle Squires, Ira A. Fulton Schools of Engineering, Arizona State Univ. (United States)
Anil Rao, Intel Corporation (United States)
Break
Coffee Break 10:00 AM - 10:30 AM
Session 5:
New Spectroscopic Applications II
23 April 2024 • 10:30 AM - 11:30 AM EDT | National Harbor 4
Session Chair:
Luisa T. M. Profeta, Rigaku Analytical Devices (United States)
13026-18
On demand | Presented live 23 April 2024
Show Abstract +
This paper introduces a novel laser-based system designed for real-time Raman spectroscopy applied to in-line combustion diagnostics.
While Raman spectroscopy is a well-established technique for solid and liquid analysis, its application to gas samples is challenging due to their low density, which limits the intensity of Raman scattering. To address this issue, our system utilizes a multipass cell, strategically designed to enhance signal generation and its collection.
The instrument performs calibrated analysis, providing qualitative and quantitative information about gas composition. Depending by the application, the system can work with spectra integration time ranging from 0.15 second up to 10 seconds.
This study has demonstrated that Raman spectroscopy can be a useful tool for combustion diagnostics, as it can operate fast enough to follow the time scale of combustion phenomena.
13026-19
On demand | Presented live 23 April 2024
Show Abstract +
The Natural Gas (NG) sector is looking at the Hydrogen-enriched Natural Gas mixtures (H-NG) with growing interest. Hydrogen injections in the NG networks are expected to increase in the next years. At the same time, there is the requirement to constantly sample the combustible blends composition and their thermodynamics properties.
An industrial-grade instrument based on Raman spectroscopy has been developed with the aim to determine the gas blends composition in an accurate and repeatable way directly on-site. The system provides self-standing and non-invasive analysis while ensuring its operation in the industrial temperature range, from -20°C to 50°C.
The results obtained during the system validation in a climatic chamber show a good accuracy in single component calculation and thermodynamics characterization on NG and H-NG mixtures. The calorific value, as calculated by the measured gas mixture concentration, results within ±0.5% error in the full temperature range.
13026-20
On demand | Presented live 23 April 2024
Show Abstract +
Artificial intelligence (and its variants, e.g., machine learning, deep learning) are receiving significant attention ion the scientific journals and the popular press [1]. In this presentation, Artificial Intelligence methods as applied to spectrochemistry employed for chemical analysis will be described in detail.
[1] Z. Li, X. Zhang, G. A. Mohua and V. Karanassios, Artificial Neural Networks (ANNs) for spectral interference correction using a large-size spectrometer and ANN-based Deep Learning for a miniature one. Invited, open access book chapter (click here for a free download. https://www.intechopen.com/chapters/57282), Chapter 12, Pages 227-249, InTech Publishing, December 20, 2017, DOI: 10.5772/intechopen.71039
Break
Lunch/Exhibition Break 11:30 AM - 3:30 PM
Session 6:
Next-Generation and CBRNE Sensing: Joint Session with Conferences 13026 and 13056
23 April 2024 • 3:30 PM - 5:10 PM EDT | National Harbor 4
Session Chairs:
Augustus W. Fountain, Univ. of South Carolina (United States), Richard A. Crocombe, Crocombe Spectroscopic Consulting, LLC (United States)
13056-27
23 April 2024 • 3:30 PM - 3:50 PM EDT | National Harbor 4
Show Abstract +
Advances in critical subsystem technologies have allowed Telops to develop the next-generation of hyperspectral imaging systems with significant reductions in Size, Weight, and Power (SWaP) requirements while maintaining imaging and data quality performance. This presentation will serve as an overview of the system architecture and analysis capabilities of the next-generation Hyper-Cam Nano hyperspectral imaging system. The Hyper-Cam Nano platform includes a miniaturized (172 x 172 x 181 mm) Fourier Transform Spectrometer (FTS) mounted on a gimbal, which can be deployed in a ground configuration, or easily affixed to an octocopter drone. The real-time data analysis capabilities embedded in the Hyper-Cam Nano provide an ability to simultaneously resolve multiple spectral signatures within a scene for the detection and identification of gases and solids, and even quantification for gases. This novel instrument will offer new capabilities in gas detection and identification applications for the defense, industrial, and environmental sectors.
13056-28
On demand | Presented live 23 April 2024
Show Abstract +
There is a need in the Homeland Security Enterprise for ensuring food defense against both accidental and intentional chemical contamination. Emerging sensing technologies from the fields of nanomaterials and machine learning provide an opportunity for low-cost microsensors that could be widely distributed to provide onsite and real-time awareness of contamination events. To survey the challenges around this objective, two nanomaterial-based sensors were evaluated for their ability to identify chemical vapors and detect contamination in complex mixtures in common food matrices. Technical challenges were identified, with the most significant being variable signature responses between different detectors of the same type. Strategies for mitigation of sensor variability were evaluated, including machine learning techniques as well as sensor calibration procedures.
13056-29
23 April 2024 • 4:10 PM - 4:30 PM EDT | National Harbor 4
Show Abstract +
Presented in this research is a compact, all-solid state micro-spectrometer developed for in-situ detection and identification of hazardous biological and chemical agents. Whilst spectroscopy for this type of sensing is effective in labs, existing technologies are limited by their size and user-friendliness. Our innovative infrared detector uses a spatially chirped resonant cavity-enhanced structure which enables detection within a narrow spectral range (linewidth of 20-50 nm), allowing for highly sensitive detection of chemical spectral fingerprints. Using a linear array of these detectors, reconstruction of the local area spectrum can be achieved whilst reducing size and operational requirements.
13026-23
On demand | Presented live 23 April 2024
Show Abstract +
A smart robotic solution was developed by constructing and integrating a Raman spectroscopic system with a miniature robot for forensic application in post-blast investigations, terrorism acts, chemical industrial accidents, and large-scale disasters. This controlled mobile system was designed to carry out non-contact, non-destructive, rapid detection and real-time forensic analysis of unknown chemicals and materials in various terrains. It can be deployed to cover large scenes and rough terrain, overcome indoor and outdoor obstacles, access hard-to-reach confined spaces in collapsed buildings or narrow drains, and operate in hazardous environments. Key to the approach is the remote control of the robotic system via a ground control system, which ensures the safety of officers while enabling them to accurately access and examine specific targets at the scene, and quickly reach informed decisions.
13026-24
On demand | Presented live 23 April 2024
Show Abstract +
The detection of trace amounts of hazardous agents has become crucial for protection of human life, infrastructure and the environment. Single-particle mass spectrometry (SPMS) has proven to be a sensitive measurement technique for instantly revealing the chemical composition of individual, potentially harmful aerosol and dust particles. In this study, we focus on profiling non-volatile particles of explosive compounds in powdered form. It is reported, how the unique SPMS technology, based on (1) particle velocimetry and sizing, (2) sophisticated laser ionization and (3) bipolar time-of-flight mass spectrometry (TOF-MS) has been tailored and applied for the detection of individual particles of common explosive substances in the micro- and nanometer range. Out of more than 30 different types of military and home-made explosives, which were investigated in our recent laboratory measurements, the mass spectra of 12 commonly used explosives compounds are examined. Steps are described for automated and reliable identification of characteristic spectral markers of each of the explosives in their respective mass spectra.
Poster Session
23 April 2024 • 6:00 PM - 7:30 PM EDT | Potomac C
Conference attendees are invited to attend the symposium-wide poster session on Tuesday evening. Come view the SPIE DCS posters, enjoy light refreshments, 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: Tuesday 12:00 PM - 5:30 PM
Poster authors, view poster presentation guidelines and set-up instructions at http://spie.org/DCSPosterGuidelines.
Poster Setup: Tuesday 12:00 PM - 5:30 PM
Poster authors, view poster presentation guidelines and set-up instructions at http://spie.org/DCSPosterGuidelines.
13026-16
On demand | Presented live 23 April 2024
Show Abstract +
The amount of end-of-life photovoltaic modules will increase significantly in the upcoming years. In order to enable a high-quality recycling process, innovative approaches to separate the module laminates layer by layer are required. In this work we use a combination of near-infrared spectroscopy (NIRS) and optical coherence tomography (OCT) to characterize the identity and dimensions of the individual layers within the multi-material composite of a PV module, especially the backsheet. NIRS is used to identify the polymer material types, while OCT measures the respective thickness of the layer. First results show that the combination of both techniques enables a precise qualitative and quantitative description of the layers of a PV module that can be used as an input for subsequent separation and recycling processes.
13026-30
On demand | Presented live 23 April 2024
Show Abstract +
This study investigates the application of hyper-spectral imaging (HSI) for detecting polymer contaminants on glass substrates following photovoltaic (PV) recycling processes. HSI's non-destructive and real-time capabilities are essential for ensuring the quality of separated PV components such as the glass pane. Experimental results demonstrate the precision of HSI in identifying polymer residues, leading to clean, uncontaminated glass suitable for complete re-use. Moreover, our work examines the challenges and future potential of HSI in contaminant detection, highlighting its importance as an in-line quality control tool in industrial recycling facilities.
Digital Posters
The posters listed below are available exclusively for online viewing during the week of SPIE Defense + Commercial Sensing 2024.
Additional Information
View call for papers
What you will need to submit:
- Presentation title
- Author(s) information
- Speaker biography (1000-character max including spaces)
- Abstract for technical review (200-300 words; text only)
- Summary of abstract for display in the program (50-150 words; text only)
- Keywords used in search for your paper (optional)
- Check the individual conference call for papers for additional requirements (i.e. extended abstract PDF upload for review or instructions for award competitions)