Large-Area Bright Emission of Plasmon-Coupled Dark Excitons at Room Temperature.

ABSTRACT: Brightening dark excitons in transition metal dichalcogenide monolayers (MLs) can provide large-area ultrathin devices for applications in quantum information science and optoelectronics. For practical applications of dark excitons, a robust and bright emission over a wide area at room temperature is desirable; however, no reliable approach has been demonstrated thus far. In this study, an efficient approach is presented for brightening dark excitons at room temperature over a large area of a WSe₂ ML via coupling between plasmons and dark excitons. When a WSe₂ ML is placed on gold micropillars (Au MPs), dark excitons are efficiently coupled to strongly localized surface plasmons at the edges of the Au MPs, along with a strong photoluminescence (PL) emission. Room-temp

SUBMITTER: Jeong H 

PROVIDER: S-EPMC11744724 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature