Polarized Photoluminescence Enhancement of Monolayer MoS2 Coupled with Plasmonic Salisbury‐Type Absorber.

The plasmon‐mediated manipulation of light–matter interaction in 2D atomically transition‐metal dichalcogenides (TMDs) critically depends on the design of plasmonic nanostructures to achieve the maximum optical field in TMDs. Here, a metal–isolator–metal Salisbury‐type perfect absorber is fabricated to serve as a generator of the localized surface plasmons. The significant photoluminescence (PL) enhancement up to 60‐fold is observed experimentally in the monolayer MoS2 on the top of this gold plasmonic hybrid nanostructures. Furthermore, the PL linear polarization can approach ≈60% around the peak of exciton emission and is independent on the polarization of the excitation laser. This Salisbury‐type plasmon–exciton hybrid system paves a new way to develop optoelectronic devices based on TMDs. [ABSTRACT FROM AUTHOR]