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Polarization-Dependent Purcell Enhancement on a Two-Dimensional h-BN/WS 2 Light Emitter with a Dielectric Plasmonic Nanocavity.
- Source :
-
Nano letters [Nano Lett] 2022 Feb 23; Vol. 22 (4), pp. 1649-1655. Date of Electronic Publication: 2022 Feb 02. - Publication Year :
- 2022
-
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/WS <subscript>2</subscript> heterostructure integrated with an array of TiO <subscript>2</subscript> 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.
Details
- Language :
- English
- ISSN :
- 1530-6992
- Volume :
- 22
- Issue :
- 4
- Database :
- MEDLINE
- Journal :
- Nano letters
- Publication Type :
- Academic Journal
- Accession number :
- 35107290
- Full Text :
- https://doi.org/10.1021/acs.nanolett.1c04640