Atomically thin semiconductors for nanophotonics

https://phys.org/news/2022-06-atomically-thin-semiconductors-nanophotonics.html

"emitted light... excitons in ultra-thin semiconductors molybdenum disulfide (MoS2) and tungsten disulfide (WS2)... changing distance of WS2 bilayer to mirror, excitation enhancement increases exciton-exciton annihilation... higher polarization... crystalline silicon nanodisks preserve circular polarization of light near field... enhancement valley-polarized emission... increase sensitivity down to single molecule level, and valleytronic devices... new generation of electronic devices based on valley polarization"

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