Low-noise GaAs quantum dots for quantum photonics

Liang Zhai (), Matthias C. Löbl, Giang N. Nguyen, Julian Ritzmann, Alisa Javadi, Clemens Spinnler, Andreas D. Wieck, Arne Ludwig and Richard J. Warburton
Additional contact information
Liang Zhai: University of Basel
Matthias C. Löbl: University of Basel
Giang N. Nguyen: University of Basel
Julian Ritzmann: Ruhr-Universität Bochum
Alisa Javadi: University of Basel
Clemens Spinnler: University of Basel
Andreas D. Wieck: Ruhr-Universität Bochum
Arne Ludwig: Ruhr-Universität Bochum
Richard J. Warburton: University of Basel

Nature Communications, 2020, vol. 11, issue 1, 1-8

Abstract: Abstract Quantum dots are both excellent single-photon sources and hosts for single spins. This combination enables the deterministic generation of Raman-photons—bandwidth-matched to an atomic quantum-memory—and the generation of photon cluster states, a resource in quantum communication and measurement-based quantum computing. GaAs quantum dots in AlGaAs can be matched in frequency to a rubidium-based photon memory, and have potentially improved electron spin coherence compared to the widely used InGaAs quantum dots. However, their charge stability and optical linewidths are typically much worse than for their InGaAs counterparts. Here, we embed GaAs quantum dots into an n-i-p-diode specially designed for low-temperature operation. We demonstrate ultra-low noise behaviour: charge control via Coulomb blockade, close-to lifetime-limited linewidths, and no blinking. We observe high-fidelity optical electron-spin initialisation and long electron-spin lifetimes for these quantum dots. Our work establishes a materials platform for low-noise quantum photonics close to the red part of the spectrum.

Date: 2020
References: Add references at CitEc
Citations: View citations in EconPapers (7)

Downloads: (external link)
https://www.nature.com/articles/s41467-020-18625-z Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-18625-z

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/s41467-020-18625-z

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().