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arXiv · 1807.02778

Microcavity enhanced single photon emission from two-dimensional WSe2

L. C. Flatten·L. Weng·A. Branny·S. Johnson·P. R. Dolan·A. A. P. Trichet·B. D. Gerardot·J. M. Smith
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Abstract

Atomically flat semiconducting materials such as monolayer WSe$_2$ hold great promise for novel optoelectronic devices. Recently, quantum light emission has been observed from bound excitons in exfoliated WSe$_2$. As part of developing optoelectronic devices, the control of the radiative properties of such emitters is an important step. Here we report the coupling of a bound exciton in WSe$_2$ to open microcavities. We use a range of radii of curvature in the plano-concave cavity geometry with mode volumes in the $\lambda^3$ regime, giving Purcell factors of up to 8 while increasing the photon flux five-fold. Additionally we determine the quantum efficiency of the single photon emitter to be $\eta = 0.46 \pm 0.03$. Our findings pave the way to cavity-enhanced monolayer based single photon sources for a wide range of applications in nanophotonics and quantum information technologies.

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L. C. Flatten, L. Weng, A. Branny, S. Johnson, P. R. Dolan, A. A. P. Trichet, B. D. Gerardot, J. M. Smith. 2018-07-08. Microcavity enhanced single photon emission from two-dimensional WSe2. https://doi.org/10.1063/1.5026779

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