Exciton-dielectric mode coupling in MoS₂ nanoflakes visualized by cathodoluminescence.

ABSTRACT: Two-dimensional (2D) transition metal dichalcogenides (TMDCs), possessing unique exciton luminescence properties, have attracted significant attention for use in optical and electrical devices. TMDCs are also high refractive index materials that can strongly confine the electromagnetic field in nanoscale dimensions when patterned into nanostructures, thus resulting in complex light emission that includes exciton and dielectric resonances. Here, we use cathodoluminescence (CL) to experimentally visualize the emission modes of single molybdenum disulfide (MoS₂) nanoflakes and to investigate luminescence enhancement due to dielectric resonances in nanoscale dimensions, by using a scanning transmission electron microscope. Specifically, we identify dielectric modes whose resonant wa

SUBMITTER: Vu DT 

PROVIDER: S-EPMC11501478 | biostudies-literature | 2022 Apr

REPOSITORIES: biostudies-literature