Polarization-correlated photons from a positively charged quantum dot

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Polarization-correlated photons from a positively charged quantum dot

Y. Cao, A. J. Bennett, I. Farrer, D. A. Ritchie, and A. J. Shields

Phys. Rev. B 92, 081302(R) – Published 7 August 2015

Abstract

Polarized cross-correlation spectroscopy on a quantum dot charged with a single hole shows the sequential emission of photons with common circular polarization. This effect is visible without magnetic field, but becomes more pronounced as the field along the quantization axis is increased. We interpret the data in terms of electron dephasing in the $X^{+}$ state caused by the Overhauser field of nuclei in the dot. We predict the correlation time scale can be increased by accelerating the emission rate with cavity QED.

Received 13 May 2015
Revised 14 July 2015

DOI:https://doi.org/10.1103/PhysRevB.92.081302

Authors & Affiliations

Y. Cao^1,2, A. J. Bennett¹, I. Farrer³, D. A. Ritchie³, and A. J. Shields¹

¹Toshiba Research Europe Limited, Cambridge Research Laboratory, 208 Science Park, Milton Road, Cambridge CB4 0GZ, United Kingdom
²Department of Physics, Imperial College London, Prince Consort Road, London SW7 2AZ, United Kingdom
³Cavendish Laboratory, Cambridge University, J. J. Thomson Avenue, Cambridge CB3 0HE, United Kingdom

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Issue

Vol. 92, Iss. 8 — 15 August 2015

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Physical Review B

covering condensed matter and materials physics