Microcavities constructed from materials with a second-order nonlinear coefficient have enabled efficient second-harmonic(SH)generation at a low power level.However,it is still technically challenging to realize doubl...Microcavities constructed from materials with a second-order nonlinear coefficient have enabled efficient second-harmonic(SH)generation at a low power level.However,it is still technically challenging to realize double resonance with large nonlinear modal overlap in a microcavity.Here,we propose a design for a robust,tunable,and easy coupling double-resonance SH generation based on the combination of a newly developed fiber-based Fabry-Perot microcavity and a sandwich structure,whose numerical SH conversion efficiency is up to 3000%W^(-1).This proposal provides a feasible way to construct ultra-efficient nonlinear devices for generation of classical and quantum light sources.展开更多
基金supported by the National Key R&D Program of China(2021YFA1400803)the National Natural Science Foundation of China(No.12204019)+1 种基金the China Postdoctoral Science Foundation(No.2022M710233)the National PostdoctoralProgramforInnovativeTalents(No.BX20220010)。
文摘Microcavities constructed from materials with a second-order nonlinear coefficient have enabled efficient second-harmonic(SH)generation at a low power level.However,it is still technically challenging to realize double resonance with large nonlinear modal overlap in a microcavity.Here,we propose a design for a robust,tunable,and easy coupling double-resonance SH generation based on the combination of a newly developed fiber-based Fabry-Perot microcavity and a sandwich structure,whose numerical SH conversion efficiency is up to 3000%W^(-1).This proposal provides a feasible way to construct ultra-efficient nonlinear devices for generation of classical and quantum light sources.
