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Single-photon emission from single-electron transport in a SAW-driven lateral light-emitting diode.

Accepted version
Peer-reviewed

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Authors

Rubino, Antonio 
Chung, Yousun 
Hou, Hangtian 

Abstract

The long-distance quantum transfer between electron-spin qubits in semiconductors is important for realising large-scale quantum computing circuits. Electron-spin to photon-polarisation conversion is a promising technology for achieving free-space or fibre-coupled quantum transfer. In this work, using only regular lithography techniques on a conventional 15 nm GaAs quantum well, we demonstrate acoustically-driven generation of single photons from single electrons, without the need for a self-assembled quantum dot. In this device, a single electron is carried in a potential minimum of a surface acoustic wave (SAW) and is transported to a region of holes to form an exciton. The exciton then decays and creates a single optical photon within 100 ps. This SAW-driven electroluminescence, without optimisation, yields photon antibunching with g(2)(0) = 0.39 ± 0.05 in the single-electron limit (g(2)(0) = 0.63 ± 0.03 in the raw histogram). Our work marks the first step towards electron-to-photon (spin-to-polarisation) qubit conversion for scaleable quantum computing architectures.

Description

Keywords

cond-mat.mes-hall, cond-mat.mes-hall, physics.app-ph, quant-ph

Journal Title

Nat Commun

Conference Name

Journal ISSN

2041-1723
2041-1723

Volume Title

11

Publisher

Springer Science and Business Media LLC

Rights

All rights reserved
Sponsorship
Engineering and Physical Sciences Research Council (EP/H017720/1)
Engineering and Physical Sciences Research Council (EP/J003417/1)
European Commission (235515)
European Commission Horizon 2020 (H2020) Marie Sk?odowska-Curie actions (642688)