Ultra-large nonlinear parameters and all-optical modulation of a transition metal dichalcogenides on silicon waveguide.

ABSTRACT: We integrate monolayer TMDCs into silicon-on-insulation (SOI) waveguides and dielectric-loaded surface plasmon polariton (DLSPP) waveguides to enhance nonlinear parameters (γ) of silicon-based waveguides. By optimizing the waveguide geometry, we have achieved significantly improved γ. In MoSe₂-on-SOI and MoSe₂-in-DLSPP waveguide with optimized geometry, the maximum γ at the excitonic resonant peak (λ_p) is 5001.87 W^-1m^-1 and 119111.94 W^-1m^-1 respectively for each case. Based on this, we designed all-optical TMDCs-on-SOI phase and extinction waveguide modulators, achieving π-phase and 3 dB modulation with millimeter-scale modulation lengths under an optical pump intensity of 1 GW/[Formula: see text] at the optical c

SUBMITTER: Ding T 

PROVIDER: S-EPMC11696087 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature