Enhanced second-harmonic generation from two-dimensional MoSe₂ on a silicon waveguide.

ABSTRACT: Two-dimensional transition-metal dichalcogenides (TMDCs) with intrinsically broken crystal inversion symmetry and large second-order nonlinear responses have shown great promise for future nonlinear light sources. However, the sub-nanometer monolayer thickness of such materials limits the length of their nonlinear interaction with light. Here, we experimentally demonstrate the enhancement of the second-harmonic generation from monolayer MoSe₂ by its integration onto a 220-nm-thick silicon waveguide. Such on-chip integration allows for a marked increase in the interaction length between the MoSe₂ and the waveguide mode, further enabling phase matching of the nonlinear process. The demonstrated TMDC-silicon photonic hybrid integration opens the door to second-order nonl

SUBMITTER: Chen H 

PROVIDER: S-EPMC6061909 | biostudies-literature | 2017 Oct

REPOSITORIES: biostudies-literature