Surface plasmon polariton–enhanced photoluminescence of monolayer MoS 2 on suspended periodic metallic structures

Nanophotonics

article

Huanhuan Su¹  Lin Zhou¹  Shan Wu²  Yuhan Yang¹  Qing Leng²  Lei Huang²  Junqi Fu²  Qianjin Wang¹  Hui Liu¹ 

[1] School of Physics and College of Engineering and Applied Sciences, National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University;Key Laboratory of Functional Materials and Devices for Informatics of Anhui Higher Education Institutes, Fuyang Normal University;School of Electronic Science and Engineering, Advanced Photonics Center, Southeast University

关键词: photoluminescence;    surface plasmon polariton (SPP);    transition metal dichalcogenides (TMDs);   

DOI  :  10.1515/nanoph-2020-0545

学科分类：社会科学、人文和艺术（综合）

来源: De Gruyter

【 摘 要 】

Plasmonic nanostructures have garnered tremendous interest in enhanced light–matter interaction because of their unique capability of extreme field confinement in nanoscale, especially beneficial for boosting the photoluminescence (PL) signals of weak light–matter interaction materials such as transition metal dichalcogenides atomic crystals. Here we report the surface plasmon polariton (SPP)-assisted PL enhancement of MoS 2 monolayer via a suspended periodic metallic (SPM) structure. Without involving metallic nanoparticle–based plasmonic geometries, the SPM structure can enable more than two orders of magnitude PL enhancement. Systematic analysis unravels the underlying physics of the pronounced enhancement to two primary plasmonic effects: concentrated local field of SPP enabled excitation rate increment (45.2) as well as the quantum yield amplification (5.4 times) by the SPM nanostructure, overwhelming most of the nanoparticle-based geometries reported thus far. Our results provide a powerful way to boost two-dimensional exciton emission by plasmonic effects which may shed light on the on-chip photonic integration of 2D materials.

【 授权许可】

CC BY