Superradiance in a large and dilute cloud of cold atoms in the linear-optics regime

Michelle O. Araújo, Ivor Krešić, Robin Kaiser, William Guerin

Research output: Contribution to journalArticle

59 Citations (Scopus)

Abstract

Superradiance has been extensively studied in the 1970s and 1980s in the regime of superfluorescence, where a large number of atoms are initially excited. Cooperative scattering in the linear-optics regime, or "single-photon superradiance," has been investigated much more recently, and superradiant decay has also been predicted, even for a spherical sample of large extent and low density, where the distance between atoms is much larger than the wavelength. Here, we demonstrate this effect experimentally by directly measuring the decay rate of the off-axis fluorescence of a large and dilute cloud of cold rubidium atoms after the sudden switch off of a low-intensity laser driving the atomic transition. We show that, at large detuning, the decay rate increases with the on-resonance optical depth. In contrast to forward scattering, the superradiant decay of off-axis fluorescence is suppressed near resonance due to attenuation and multiple-scattering effects.

LanguageEnglish
Article number073002
Number of pages6
JournalPhysical Review Letters
Volume117
Issue number7
DOIs
Publication statusPublished - 10 Aug 2016

Fingerprint

optics
decay rates
atoms
fluorescence
forward scattering
decay
rubidium
scattering
optical thickness
switches
attenuation
photons
wavelengths
lasers

Keywords

  • superradiance
  • superfluorescence
  • cooperative scattering
  • linear-optics
  • single-photon superradiance
  • wavelength
  • rubidium
  • detuning
  • decay rates

Cite this

Araújo, Michelle O. ; Krešić, Ivor ; Kaiser, Robin ; Guerin, William. / Superradiance in a large and dilute cloud of cold atoms in the linear-optics regime. In: Physical Review Letters. 2016 ; Vol. 117, No. 7.
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Superradiance in a large and dilute cloud of cold atoms in the linear-optics regime. / Araújo, Michelle O.; Krešić, Ivor; Kaiser, Robin; Guerin, William.

In: Physical Review Letters, Vol. 117, No. 7, 073002, 10.08.2016.

Research output: Contribution to journalArticle

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AU - Araújo, Michelle O.

AU - Krešić, Ivor

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