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Enhancement of Single-Photon Emission Rate from InGaAs/GaAs Quantum-Dot/Nanowire Heterostructure by Wire-Groove Nanocavity

School of Mechanical and Electric Engineering, Guangzhou University, Guangzhou 510006, China
Photonics Research Centre, Department of Electronic and Information Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China
4catalyzer Inc., Guilford, CT 06437, USA
Author to whom correspondence should be addressed.
Nanomaterials 2019, 9(5), 671;
Received: 19 February 2019 / Revised: 16 April 2019 / Accepted: 22 April 2019 / Published: 1 May 2019
(This article belongs to the Special Issue Advances in Photonic and Plasmonic Nanomaterials)
PDF [2090 KB, uploaded 1 May 2019]


Spontaneous emission of luminescent material is strongly dependent on the surrounding electromagnetic environment. To enhance the emission rate of a single-photon emitter, we proposed a wire-groove resonant nanocavity around the single-photon emitter. An InGaAs quantum dot embedded in a GaAs nanowire was employed as a site-control single-photon emitter. The nanoscale cavity built by a wire-groove perpendicular to the quantum dot with an extremely narrow width of 10 nm exhibited an extremely small volume of 10 × 40 × 259 nm3. Theoretical analysis showed that the emission rate of the quantum dot was dramatically enhanced by 617x due to the Purcell effect induced by the wire-groove cavity. A fast single-photon emitter with a rate of 50.2 GHz can be obtained that speeds up the data rate of the single-photon emitter. This ultrafast single-photon source would be of great significance in quantum information systems and networks. View Full-Text
Keywords: quantum dot; nanowire; single photon; cavity quantum electrodynamics quantum dot; nanowire; single photon; cavity quantum electrodynamics

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Wei, W.; Yan, X.; Liu, J.; Shen, B.; Luo, W.; Ma, X.; Zhang, X. Enhancement of Single-Photon Emission Rate from InGaAs/GaAs Quantum-Dot/Nanowire Heterostructure by Wire-Groove Nanocavity. Nanomaterials 2019, 9, 671.

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