A silicon carbide room-temperature single-photon source

S. Castelletto, B. C. Johnson, V. Ivády, N. Stavrias, T. Umeda, A. Gali, T. Ohshima

Research output: Contribution to journalArticle

228 Citations (Scopus)

Abstract

Over the past few years, single-photon generation has been realized in numerous systems: single molecules, quantum dots, diamond colour centres and others. The generation and detection of single photons play a central role in the experimental foundation of quantum mechanics and measurement theory. An efficient and high-quality single-photon source is needed to implement quantum key distribution, quantum repeaters and photonic quantum information processing. Here we report the identification and formation of ultrabright, room-temperature, photostable single-photon sources in a device-friendly material, silicon carbide (SiC). The source is composed of an intrinsic defect, known as the carbon antisite-vacancy pair, created by carefully optimized electron irradiation and annealing of ultrapure SiC. An extreme brightness (2×10 6 counts s -1) resulting from polarization rules and a high quantum efficiency is obtained in the bulk without resorting to the use of a cavity or plasmonic structure. This may benefit future integrated quantum photonic devices.

Original languageEnglish
Pages (from-to)151-156
Number of pages6
JournalNature Materials
Volume13
Issue number2
DOIs
Publication statusPublished - Feb 2014

Fingerprint

Silicon carbide
silicon carbides
Light sources
Photons
photons
room temperature
Measurement theory
photonics
Quantum cryptography
Color centers
Temperature
Photonic devices
Diamond
repeaters
Electron irradiation
Telecommunication repeaters
Quantum theory
electron irradiation
color centers
Quantum efficiency

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Condensed Matter Physics
  • Materials Science(all)
  • Chemistry(all)

Cite this

Castelletto, S., Johnson, B. C., Ivády, V., Stavrias, N., Umeda, T., Gali, A., & Ohshima, T. (2014). A silicon carbide room-temperature single-photon source. Nature Materials, 13(2), 151-156. https://doi.org/10.1038/nmat3806

A silicon carbide room-temperature single-photon source. / Castelletto, S.; Johnson, B. C.; Ivády, V.; Stavrias, N.; Umeda, T.; Gali, A.; Ohshima, T.

In: Nature Materials, Vol. 13, No. 2, 02.2014, p. 151-156.

Research output: Contribution to journalArticle

Castelletto, S, Johnson, BC, Ivády, V, Stavrias, N, Umeda, T, Gali, A & Ohshima, T 2014, 'A silicon carbide room-temperature single-photon source', Nature Materials, vol. 13, no. 2, pp. 151-156. https://doi.org/10.1038/nmat3806
Castelletto S, Johnson BC, Ivády V, Stavrias N, Umeda T, Gali A et al. A silicon carbide room-temperature single-photon source. Nature Materials. 2014 Feb;13(2):151-156. https://doi.org/10.1038/nmat3806
Castelletto, S. ; Johnson, B. C. ; Ivády, V. ; Stavrias, N. ; Umeda, T. ; Gali, A. ; Ohshima, T. / A silicon carbide room-temperature single-photon source. In: Nature Materials. 2014 ; Vol. 13, No. 2. pp. 151-156.
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