Terahertz Photoconductive Metasurface Detector with enhanced Two-Step Photon Absorption at 1550 nm

Hyunseung Jung,Lucy L Hale,Jayson Briscoe,Raktim Sarma,Ting Shan Luk,Sadhvikas J Addamane,John L Reno,Igal Brener,Oleg Mitrofanov

2023 Conference on Lasers and Electro-Optics (CLEO)（2023）

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摘要

We demonstrate the use of low-temperature grown GaAs (LT-GaAs) metasurface as an ultrafast photoconductive switching element gated with 1550 nm laser pulses. The metasurface is designed to enhance a weak two-step photon absorption at 1550 nm, enabling THz pulse detection.

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