Collective shift in resonant light scattering by a one-dimensional atomic chain

• URL: http://arxiv.org/abs/2004.05395v2
• Date: Mon, 25 May 2020 15:40:44 GMT
• Title: Collective shift in resonant light scattering by a one-dimensional atomic chain
• Authors: Antoine Glicenstein, Giovanni Ferioli, Nikola Sibalic, Ludovic Brossard, Igor Ferrier-Barbut, Antoine Browaeys
• Abstract summary: We experimentally study resonant light scattering by a one-dimensional randomly filled chain of cold two-level atoms. We observe constructive interferences in light-induced dipole-dipole interactions between the atoms.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We experimentally study resonant light scattering by a one-dimensional randomly filled chain of cold two-level atoms. By a local measurement of the light scattered along the chain, we observe constructive interferences in light-induced dipole-dipole interactions between the atoms. They lead to a shift of the collective resonance despite the average interatomic distance being larger than the wavelength of the light. This result demonstrates that strong collective effects can be enhanced by structuring the geometrical arrangement of the ensemble. We also explore the high intensity regime where atoms cannot be described classically. We compare our measurement to a mean-field, nonlinear coupled-dipole model accounting for the saturation of the response of a single atom.

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