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arXiv · 2112.02511

Polarized exciton emission enhancement of monolayer MoS2 coupled with plasmonic Salisbury-type absorber

Wei Li·Ming Xin·Wenze Lan·Qinghu Bai·Shuo Du·Gang Wang·Baoli Liu·Changzhi Gu
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Abstract

The plasmon-mediated manipulation of light-matter interaction in two-dimensional 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 was fabricated to serve as a generator of the localized surface plasmons. The significant photoluminescence (PL) enhancement up to 60-fold was observed experimentally in the monolayer (ML) 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.

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Wei Li, Ming Xin, Wenze Lan, Qinghu Bai, Shuo Du, Gang Wang, Baoli Liu, Changzhi Gu. 2021-12-05. Polarized exciton emission enhancement of monolayer MoS2 coupled with plasmonic Salisbury-type absorber. https://arxiv.org/abs/2112.02511

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