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

Article

关键词: ENHANCED 2ND-HARMONIC GENERATION;    HARMONIC-GENERATION;    RESONATORS;   

DOI  :  10.1103/PhysRevB.107.075441

来源: SCIE

【 摘 要 】

We present nonlinear optical four-wave mixing in a silicon nanodisk dimer metasurface. Under the oblique incident plane waves, the designed metasurface exhibits a multiresonant 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 nondegenerate four-wave mixing are demonstrated, giving rise to ten 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.

【 授权许可】

Free