Bright Polarized Single-Photon Source Based on a Linear Dipole

2020/07/08 by S. E. Thomas, M. Billard, N. Coste +13 · 1 voice · 1 citation
Physics and Astronomy · #quant-ph

paper · pdf · doi:10.1103/physrevlett.126.233601

published as Phys. Rev. Lett. 126, 233601 (2021) · 5 pages, 4 figures, plus supplementary material

arxiv published 2020/07/08 · arxiv created 2021/10/26 · arxiv updated 2021/10/28

Abstract

Semiconductor quantum dots in cavities are promising single-photon sources. Here, we present a path to deterministic operation, by harnessing the intrinsic linear dipole in a neutral quantum dot via phonon-assisted excitation. This enables emission of fully polarized single photons, with a measured degree of linear polarization up to 0.994 ± 0.007, and high population inversion -- 85% as high as resonant excitation. We demonstrate a single-photon source with a polarized first lens brightness of 0.50 ± 0.01, a single-photon purity of 0.954 ± 0.001 and single-photon indistinguishability of 0.909 ± 0.004.

Cited by

• Optimizing the quantum interference between single photons and local oscillator with photon correlations

Discussions

• We're excited to present our latest results: a single-photon source with a first lens brightness greater than 50%! 💡By using off-resonant, phonon-assisted excitation we replace the need for polarisat [bsky, 0 points, 0 comments]

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