• Open Access

Highly indistinguishable single photons from incoherently excited quantum dots

Marcus Reindl, Jonas H. Weber, Daniel Huber, Christian Schimpf, Saimon F. Covre da Silva, Simone L. Portalupi, Rinaldo Trotta, Peter Michler, and Armando Rastelli
Phys. Rev. B 100, 155420 – Published 18 October 2019
PDFHTMLExport Citation

Abstract

Semiconductor quantum dots with dimensions exceeding the free-exciton Bohr radius are appealing because of their high oscillator strengths. While this property has received much attention in the context of cavity quantum electrodynamics, little is known about the degree of indistinguishability of single photons consecutively emitted by such dots and on the proper excitation schemes to achieve high indistinguishability. A prominent example is represented by GaAs quantum dots obtained by local droplet etching, which recently outperformed other systems as triggered sources of entangled photon pairs. On these dots, we compare different single-photon excitation mechanisms, and we find (i) poor indistinguishability for conventional excitation via excited states and (ii) photon indistinguishablilities above 90% for both strictly resonant and for incoherent phonon-assisted excitation. Among the explored excitation schemes, optical phonon-assisted excitation allows straightforward laser rejection and is thus worth of further investigation and optimization for quantum dots embedded in high-brightness photonic structures.

  • Figure
  • Figure
  • Figure
  • Figure
  • Received 27 February 2019
  • Revised 2 August 2019

DOI:https://doi.org/10.1103/PhysRevB.100.155420

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

Published by the American Physical Society

Physics Subject Headings (PhySH)

  1. Research Areas
  1. Physical Systems
Condensed Matter, Materials & Applied PhysicsQuantum Information, Science & Technology

Authors & Affiliations

Marcus Reindl1,*, Jonas H. Weber2, Daniel Huber1, Christian Schimpf1, Saimon F. Covre da Silva1, Simone L. Portalupi2, Rinaldo Trotta3, Peter Michler2, and Armando Rastelli1,†

  • 1Institute of Semiconductor and Solid State Physics, Johannes Kepler University Linz, Altenbergerstraße 69, A-4040 Linz, Austria
  • 2Institut für Halbleiteroptik und Funktionelle Grenzflächen, Center for Integrated Quantum Science and Technology (IQST) and SCoPE, University of Stuttgart, Allmandring 3, D-70569 Stuttgart, Germany
  • 3Dipartimento di Fisica, Sapienza Universita di Roma, Piazzale Aldo Moro 5, I-00185 Rome, Italy

  • *Corresponding author: marcus.reindl@jku.at
  • Corresponding author: armando.rastelli@jku.at

Article Text

Click to Expand

Supplemental Material

Click to Expand

References

Click to Expand
Issue

Vol. 100, Iss. 15 — 15 October 2019

Reuse & Permissions
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Reuse & Permissions

It is not necessary to obtain permission to reuse this article or its components as it is available under the terms of the Creative Commons Attribution 4.0 International license. This license permits unrestricted use, distribution, and reproduction in any medium, provided attribution to the author(s) and the published article's title, journal citation, and DOI are maintained. Please note that some figures may have been included with permission from other third parties. It is your responsibility to obtain the proper permission from the rights holder directly for these figures.

×

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×