Issue 37, 2017, Issue in Progress

Enhanced light–matter interaction of a MoS2 monolayer with a gold mirror layer

Abstract

MoS2 monolayer is a member of transition metal dichalcogenides (TMDs), which has shown great potential for applications in light-emitting devices due to a direct band gap in its electronic structure. However, a region of atmomic thickness remains a challenge due to its weak light-matter interaction. Most approaches to improve the light–matter interaction of MoS2 have been devoted to plasmonic nanostructures and photonic crystal. Herein, we demonstrated a method based on the insertion of a gold mirror layer between the dielectric layer and the substrate to enhance the optical absorption and emission of the MoS2 monolayer. The hybrid nanostructure comprised a 35 nm SiO2 dielectric spacer and 40 nm golden film. The overall photoluminescence intensity was amplified nearly 4 times, resulting from enhanced optical absorption and Fabry–Perot cavity reflection. We further demonstrated that the improvement in the PL intensity can also be modulated by selecting a spacer material and changing the layer thickness. This study is broadly applicable to enhance the light–matter interaction of TMDs for applications in potential devices such as light-emitting devices, lasers, and photodetectors.

Graphical abstract: Enhanced light–matter interaction of a MoS2 monolayer with a gold mirror layer

Article information

Article type
Paper
Submitted
02 Dec 2016
Accepted
12 Apr 2017
First published
26 Apr 2017
This article is Open Access
Creative Commons BY license

RSC Adv., 2017,7, 23109-23113

Enhanced light–matter interaction of a MoS2 monolayer with a gold mirror layer

H. Xu, RSC Adv., 2017, 7, 23109 DOI: 10.1039/C6RA27691A

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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