Strong anisotropic enhancement of photoluminescence in WS₂ integrated with plasmonic nanowire array.

ABSTRACT: Layered transition metal dichalcogenides (TMDCs) have shown great potential for a wide range of applications in photonics and optoelectronics. Nevertheless, valley decoherence severely randomizes its polarization which is important to a light emitter. Plasmonic metasurface with a unique way to manipulate the light-matter interaction may provide an effective and practical solution. Here by integrating TMDCs with plasmonic nanowire arrays, we demonstrate strong anisotropic enhancement of the excitonic emission at different spectral positions. For the indirect bandgap transition in bilayer WS₂, multifold enhancement can be achieved with the photoluminescence (PL) polarization either perpendicular or parallel to the long axis of nanowires, which arises from the coupling of WS_2<

SUBMITTER: Han C 

PROVIDER: S-EPMC8115162 | biostudies-literature | 2021 May

REPOSITORIES: biostudies-literature