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arXiv · 2209.08454

High-efficiency optical frequency mixing in an all-dielectric metasurface enabled by multiple bound states in the continuum

Tingting Liu·Meibao Qin·Feng Wu·Shuyuan Xiao
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Abstract

We present nonlinear optical four-wave mixing in a silicon nanodisk dimer metasurface. Under the oblique incident plane waves, the designed metasurface exhibits a multi-resonant feature with simultaneous excitations of three quasi-bound states in the continuum (BIC). Through employing these quasi-BICs with maximizing electric field energy at the input bump wavelengths, significant enhancement of third-order nonlinear processes including third-harmonic generation, degenerate and non-degenerate four-wave mixing are demonstrated, giving rise to ten new frequencies in the visible wavelengths. This work may lead to a new frontier of ultracompact optical mixer for applications in optical circuitry, ultrasensitive sensing, and quantum nanophotonics.

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Tingting Liu, Meibao Qin, Feng Wu, Shuyuan Xiao. 2022-09-18. High-efficiency optical frequency mixing in an all-dielectric metasurface enabled by multiple bound states in the continuum. https://doi.org/10.1103/physrevb.107.075441

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