Microcavity enhanced single photon emission from two-dimensional WSe2

L. C. Flatten; L. Weng; Artur Branny; S. Johnson; P. R. Dolan; A. A. P. Trichet; Brian D. Gerardot; J. M. Smith

doi:10.1063/1.5026779

Microcavity enhanced single photon emission from two-dimensional WSe₂

L. C. Flatten, L. Weng, Artur Branny, S. Johnson, P. R. Dolan, A. A. P. Trichet, Brian D. Gerardot, J. M. Smith

Research output: Contribution to journal › Article › peer-review

42 Citations (Scopus)

Abstract

Atomically flat semiconducting materials such as monolayer WSe₂ hold great promise for novel optoelectronic devices. Recently, quantum light emission has been observed from bound excitons in exfoliated WSe₂. 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 WSe₂ to open microcavities. We use a range of radii of curvature in the plano-concave cavity geometry with mode volumes in the λ3 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 η=0.46±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.

Original language	English
Article number	191105
Journal	Applied Physics Letters
Volume	112
Issue number	19
DOIs	https://doi.org/10.1063/1.5026779
Publication status	Published - 11 May 2018

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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abstract = "Atomically flat semiconducting materials such as monolayer WSe2 hold great promise for novel optoelectronic devices. Recently, quantum light emission has been observed from bound excitons in exfoliated WSe2. 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 WSe2 to open microcavities. We use a range of radii of curvature in the plano-concave cavity geometry with mode volumes in the λ3 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 η=0.46±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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AU - Flatten, L. C.

AU - Weng, L.

AU - Branny, Artur

AU - Johnson, S.

AU - Dolan, P. R.

AU - Trichet, A. A. P.

AU - Gerardot, Brian D.

AU - Smith, J. M.

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AB - Atomically flat semiconducting materials such as monolayer WSe2 hold great promise for novel optoelectronic devices. Recently, quantum light emission has been observed from bound excitons in exfoliated WSe2. 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 WSe2 to open microcavities. We use a range of radii of curvature in the plano-concave cavity geometry with mode volumes in the λ3 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 η=0.46±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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Microcavity enhanced single photon emission from two-dimensional WSe₂

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