CVD-graphene plasmonic metasurfaces for terahertz optoelectronics (Conference Presentation)

Roberto Paiella; Yuyu Li

doi:10.1117/12.2632188

13 October 2022 CVD-graphene plasmonic metasurfaces for terahertz optoelectronics (Conference Presentation)

Roberto Paiella, Yuyu Li

Proceedings Volume PC12196, Active Photonic Platforms 2022; PC1219605 (2022) https://doi.org/10.1117/12.2632188
Event: SPIE Nanoscience + Engineering, 2022, San Diego, California, United States

Abstract

Graphene plasmonics provides a powerful means to extend the reach of metasurface technology to the terahertz spectral range, with the distinct advantage of active tunability. However, most prior proposals of graphene THz plasmonic devices assume electrical characteristics that are not compatible with sufficiently large samples grown by chemical vapor deposition (CVD). Here we introduce a comprehensive design platform that can overcome this limitation, based on graphene nanoribbons combined with metallic antennas on a vertical cavity. With this configuration, we present a single device structure that can be electrically reconfigured to enable multiple wavefront-shaping functionalities, including tunable beam steering and focusing with variable numerical aperture. Applications of the same platform to THz light emission will also be discussed. These capabilities are promising for a significant impact in multiple THz technologies for sensing, imaging, and wireless communications.

Conference Presentation

Citation Download Citation

Roberto Paiella and Yuyu Li "CVD-graphene plasmonic metasurfaces for terahertz optoelectronics (Conference Presentation)", Proc. SPIE PC12196, Active Photonic Platforms 2022, PC1219605 (13 October 2022); https://doi.org/10.1117/12.2632188

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KEYWORDS

Plasmonics

Optoelectronics

Graphene

Terahertz radiation

Chemical vapor deposition

Terahertz technology

Antennas

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