[Press Release] Preserving polarization while boosting light from atomically thin semiconductors with silicon nanospheres
Valley-polarized second-harmonic generation from monolayer WS2 with a silicon nanosphere
Schematic of the resonant structure. Right: High degree of circular polarization is preserved after enhancement
Credit: Keisuke Shinokita, Institute for Molecular Science Restriction：News organizations may use or redistribute this image, with proper attribution, as part of news coverage of this paper only.
Release Summary
In atomically thin semiconductors, enhancing the frequency-doubled light signal has come at the cost of losing polarization information tied to the valley degree of freedom. Researchers now show that silicon nanospheres can break this dilemma, providing design guidelines for next-generation valley photonic devices.
