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Breaking the loss-confinement barrier in plasmonic devices (Conference Presentation)
Author(s): Amr S. Helmy
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Paper Abstract

Plasmonics-based waveguiding structures can deliver unprecedented degrees of wave-matter interaction, enhancing linear and nonlinear optical processes such as spectroscopy, sensing and signal processing, all within small form-factors and staggering device density. However, the main obstacle to a wider adoption has always been the excessive losses that scale poorly with optical confinement / localization [1-6]. Also in this work we demonstrate how can one utilize composite plasmonic waveguides with unparalleled alleviation of the loss-confinement tradeoff to achieve record Purcell factors within plasmonic waveguides [6]. Also I this talk we plan to discuss a novel class of nanoscale devices that address unmet performance demands for applications in data communications [1-6]. The performance of emerging generations of high-speed, integrated electronic circuits is increasingly dictated by interconnect density and latency as well as by power consumption. To alleviate these limitations, data communications using photons has been deployed, where photonic circuits and devices are integrated on platforms compatible with conventional electronic technologies. Within the dominant platform; namely Si, dielectric waveguides confine light via total internal reflection. This imposes bounds on minimizing device dimensions and density of integration. Those bounds arise due to the diffraction limit and the cross-coupling between neighbouring waveguides. Nanoscale Plasmonic waveguides provide the unique ability to confine light within a few nanometers and allow for near perfect transmission through sharp bends as well as efficient light distribution between orthogonally intersecting junctions. With these structures as a building block, new levels of optoelectronic integration and performance metrics for athermal transceivers with achievable bandwidths in excess of 500 Gbps as will be overviewed in this talk. In addition opportunities for the role that 2D materials may pay in propelling these record performance metrics even further will be projected [2]. 4. References [1] W. Ma and Amr S. Helmy, "Asymmetric long-range hybrid-plasmonic modes in asymmetric nanometer-scale structures," J. Opt. Soc. Am. B, Vol. 31, pp. 1723-1729 (2014). [2] C. Lin, Amr S. Helmy. "Dynamically reconfigurable nanoscale modulators utilizing coupled hybrid plasmonics." Scientific Reports 5, 12313 (2015). [3] . Lin, R. Grassi, T. Low and Amr S. Helmy. "Multilayer black phosphorus as a versatile mid-infrared electro-optic material" ACS Nano Lett. 5, 12313 (2016). [4] Herman M. K. Wong, and Amr S. Helmy, Performance Enhancement of Nano-Scale VO2 Modulators using Hybrid Plasmonics, IEEE J. Light. Technolo., vol. 36, pp797-808, (2018) [5] Y. Su, P. Chen, C Lin and Amr. S. Helmy, Highly sensitive wavelength-scale amorphous hybrid plasmonic detectors, OSA Optica, Vol. 4, No. 10, 1259-1262, (2017). [6] Y. Su, P. Chen, C Lin and Amr. S. Helmy, (2018). Submitted

Paper Details

Date Published: 13 May 2019
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Proc. SPIE 11031, Integrated Optics: Design, Devices, Systems, and Applications V, 110310N (13 May 2019); doi: 10.1117/12.2524495
Show Author Affiliations
Amr S. Helmy, Univ. of Toronto (Canada)


Published in SPIE Proceedings Vol. 11031:
Integrated Optics: Design, Devices, Systems, and Applications V
Pavel Cheben; Jiří Čtyroký; Iñigo Molina-Fernández, Editor(s)

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