Broadband Four-Wave Mixing Enhancement in 2D Transition-Metal Dichalcogenides Using Plasmonic Structures

Nanoscale nonlinear optics provides a host of fascinating phenomena ( e.g. , saturable absorption), remarkably useful for photonic applications. [1] - [3] Recently, two-dimensional (2D) transition-metal dichalcogenides (TMDs) have attracted tremendous interest due to their fascinating optical nonlinearity [4] - [6] , such as the gate-tunability, showing the great potential for diverse on-chip nonlinear optical devices. [7] However, the applications of TMDs are limited due to the low conversion efficiency at their atomic thickness. Plasmonics provides an excellent platform for enhancing light-matter interactions in TMDs, deserving further investigation (e.g., wave mixing).