Photoconductive metasurface-based ultrafast device

Brener, Igal; Vabishchevich, Polina; Mitrofanov, Oleg

Photoconductive metasurface-based ultrafast device

Patent · Tue Sep 05 00:00:00 EDT 2023

OSTI ID:2222291

Brener, Igal; Vabishchevich, Polina; Mitrofanov, Oleg

A theoretically perfectly absorbing photoconductive all-dielectric metasurface is provided. This metasurface can improve the efficiency and performance of ultrafast photoconductive switches and detectors. In an embodiment, the metasurface is incorporated in photoconductive THz switches or detectors. In embodiments, the metasurface is constituted by a network of gallium arsenide resonators. Each resonator supports two degenerate and critically coupled magnetic dipole modes. Simultaneous excitation of these two modes leads to theoretically close-to-perfect optical absorption near the resonant wavelength.

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Research Organization:: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States); UCL Business Ltd., London (Great Britain)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

DOE Contract Number:: NA0003525

Assignee:: National Technology & Engineering Solutions of Sandia, LLC (Albuquerque, NM); UCL Business Ltd. (London, GB)

Patent Number(s):: 11,749,694

Application Number:: 16/943,001

OSTI ID:: 2222291

Country of Publication:: United States

Language:: English

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