Influence of resonant plasmonic nanoparticles on optically accessing the valley degree of freedom in 2D semiconductors.

ABSTRACT: The valley degree of freedom in atomically thin transition metal dichalcogenides, coupled with valley-contrasting optical selection rules, holds great potential for future electronic and optoelectronic devices. Resonant optical nanostructures emerge as promising tools for controlling this degree of freedom at the nanoscale. However, their impact on the circular polarization of valley-selective emission remains poorly understood. In our study, we explore a hybrid system where valley-specific emission from a molybdenum disulfide monolayer interacts with a resonant plasmonic nanosphere. Contrary to the simple intuition that a centrosymmetric nanoresonator mostly preserves the degree of circular polarization, our cryogenic experiments reveal significant depolarization of the photoluminescence

SUBMITTER: Bucher T 

PROVIDER: S-EPMC11582587 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature