Related papers: Spectral and spatial isolation of single WSe$_2$ quantum emitters using hexagonal boron nitride wrinkles

Spectral and spatial isolation of single WSe$_2$ quantum emitters using hexagonal boron nitride wrinkles

URL: http://arxiv.org/abs/2005.07013v1
Date: Thu, 14 May 2020 14:31:38 GMT
Title: Spectral and spatial isolation of single WSe$_2$ quantum emitters using hexagonal boron nitride wrinkles
Authors: Rapha\"el S. Daveau, Tom Vandekerckhove, Arunabh Mukherjee, Zefang Wang, Jie Shan, Kin Fai Mak, A. Nick Vamivakas, Gregory D. Fuchs
Abstract summary: We create spatially and spectrally isolated quantum emitters from WSe$$ monolayers with few or no sources of emission. We show that a bilayer of hexagonal boron nitride (hBN) and WSe$$ placed on a nano substrate can be used to create and shape wrinkles that communicate local strain to the WSe$$$. We compare quantum emitters created directly on top of substrate features with quantum emitters forming along wrinkles and find that the spectra of the latter consist of mainly a single peak and a low background fluorescence.
Score: 1.037769583357224
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: Monolayer WSe$_2$ hosts bright single-photon emitters. Because of its compliance, monolayer WSe$_2$ conforms to patterned substrates without breaking, thus creating the potential for large local strain, which is one activation mechanism of its intrinsic quantum emitters. Here, we report an approach to creating spatially and spectrally isolated quantum emitters from WSe$_2$ monolayers with few or no detrimental sources of emission. We show that a bilayer of hexagonal boron nitride (hBN) and WSe$_2$ placed on a nanostructured substrate can be used to create and shape wrinkles that communicate local strain to the WSe$_2$, thus creating quantum emitters that are isolated from substrate features. We compare quantum emitters created directly on top of substrate features with quantum emitters forming along wrinkles and find that the spectra of the latter consist of mainly a single peak and a low background fluorescence. We also discuss possible approaches to controlling emitter position along hBN wrinkles.

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