Observation of Collective Superstrong Coupling of Cold Atoms to a 30-m Long Optical Resonator.
Phys Rev Lett
; 123(24): 243602, 2019 Dec 13.
Article
em En
| MEDLINE
| ID: mdl-31922835
ABSTRACT
We report on the observation of collective superstrong coupling of a small ensemble of atoms interacting with the field of a 30-m long fiber resonator containing a nanofiber section. The collective light-matter coupling strength exceeds the free-spectral range and the atoms couple to consecutive longitudinal resonator modes. The measured transmission spectra of the coupled atom-resonator system provide evidence of this regime, realized with a few hundred atoms with an intrinsic single-atom cooperativity of 0.13. These results are the starting point for studies in a new setting of light-matter interaction, with strong quantum nonlinearities and a new type of dynamics.
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MEDLINE
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2019
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Article