Room-temperature spontaneous superradiance from single diamond nanocrystals

Carlo Bradac, Mattias T. Johnsson, Matthew van Breugel, Ben Q. Baragiola, Rochelle Martin, Mathieu L. Juan, Gavin K. Brennen and Thomas Volz ()
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Carlo Bradac: Macquarie University
Mattias T. Johnsson: Macquarie University
Matthew van Breugel: Macquarie University
Ben Q. Baragiola: Macquarie University
Rochelle Martin: Macquarie University
Mathieu L. Juan: Macquarie University
Gavin K. Brennen: Macquarie University
Thomas Volz: Macquarie University

Nature Communications, 2017, vol. 8, issue 1, 1-6

Abstract: Abstract Superradiance (SR) is a cooperative phenomenon which occurs when an ensemble of quantum emitters couples collectively to a mode of the electromagnetic field as a single, massive dipole that radiates photons at an enhanced rate. Previous studies on solid-state systems either reported SR from sizeable crystals with at least one spatial dimension much larger than the wavelength of the light and/or only close to liquid-helium temperatures. Here, we report the observation of room-temperature superradiance from single, highly luminescent diamond nanocrystals with spatial dimensions much smaller than the wavelength of light, and each containing a large number (~ 103) of embedded nitrogen-vacancy (NV) centres. The results pave the way towards a systematic study of SR in a well-controlled, solid-state quantum system at room temperature.

Date: 2017
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DOI: 10.1038/s41467-017-01397-4

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