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Title: Polarization-dependent purcell enhancement on a two-dimensional h-BN/WS₂ light emitter with a dielectric plasmonic nanocavity
Authors: Du, Bowen
Li, Yu
Jiang, Meiling
Zhang, Hongbo
Wu, Lishu
Wen, Wen
Liu, Zheng
Fang, Zheyu
Yu, Ting
Keywords: Science::Physics::Atomic physics::Solid state physics
Engineering::Electrical and electronic engineering::Optics, optoelectronics, photonics
Issue Date: 2022
Source: Du, B., Li, Y., Jiang, M., Zhang, H., Wu, L., Wen, W., Liu, Z., Fang, Z. & Yu, T. (2022). Polarization-dependent purcell enhancement on a two-dimensional h-BN/WS₂ light emitter with a dielectric plasmonic nanocavity. Nano Letters, 22(4), 1649-1655.
Project: NRFCRP-21-2018-0007
Journal: Nano Letters 
Abstract: Integrating two-dimensional (2D) transition-metal dichalcogenides (TMDCs) into dielectric plasmonic nanostructures enables the miniaturization of on-chip nanophotonic devices. Here we report on a high-quality light emitter based on the newly designed 2D h-BN/WS2 heterostructure integrated with an array of TiO2 nanostripes. Different from a traditional strongly coupled system such as the TMDCs/metallic plasmonic nanostructure, we first employ dielectric nanocavities and achieve a Purcell enhancement on the nanoscale at room temperature. Furthermore, we demonstrate that the light emission strength can be effectively controlled by tuning the polarization configuration. Such a polarization dependence meanwhile could be proof of the resonant energy transfer theory of dipole-dipole coupling between TMDCs and a dielectric nanostructure. This work gains experimental and simulated insights into modified spontaneous emission with dielectric nanoplasmonic platforms, presenting a promising route toward practical applications of 2D semiconducting photonic emitters on a silica-based chip.
ISSN: 1530-6984
DOI: 10.1021/acs.nanolett.1c04640
Schools: School of Materials Science and Engineering 
School of Physical and Mathematical Sciences 
School of Electrical and Electronic Engineering 
Research Centres: CNRS International NTU THALES Research Alliances 
Rights: This document is the Accepted Manuscript version of a Published Work that appeared in final form in Nano Letters, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles
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