Routing the Exciton Emissions of WS Monolayer with the High-Order Plasmon Modes of Ag Nanorods

Overview

Journal Nano Lett

Publisher American Chemical Society

Specialty Biotechnology

Date 2023 May 9

PMID 37158482

Authors

Shasha Li

Ruoqi Ai

Ka Kit Chui

Yini Fang

Yunhe Lai

Xiaolu Zhuo

Lei Shao

Jianfang Wang

Hai-Qing Lin

Affiliations

Soon will be listed here.

Abstract

Locally routing the exciton emissions in two-dimensional (2D) transition-metal dichalcogenides along different directions at the nanophotonic interface is of great interest in exploiting the promising 2D excitonic systems for functional nano-optical components. However, such control has remained elusive. Herein we report on a facile plasmonic approach for electrically controlled spatial modulation of the exciton emissions in a WS monolayer. The emission routing is enabled by the resonance coupling between the WS excitons and the multipole plasmon modes in individual silver nanorods placed on a WS monolayer. Different from prior demonstrations, the routing effect can be modulated by the doping level of the WS monolayer, enabling electrical control. Our work takes advantage of the high-quality plasmon modes supported by simple rod-shaped metal nanocrystals for the angularly resolved manipulation of 2D exciton emissions. Active control is achieved, which offers great opportunities for the development of nanoscale light sources and nanophotonic devices.

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