Ground-state atomic polarization relaxation-time measurement of Rb filled hypocycloidal core-shaped Kagome HC-PCF

T. D. Bradley, E. Ilinova, J. J. McFerran, J. Jouin, B. Debord, M. Alharbi, Philippe H. Thomas, F. Gérôme, F. Benabid

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Abstract

We report on the measurement of ground-state atomic polarization relaxation time of Rb vapor confined in five different hypocycloidal core-shape Kagome hollow-core photonic crystal fibers made with uncoated silica glass. We are able to distinguish between wall-collision and transit-time effects in an optical waveguide and deduce the contribution of the atom's dwell time at the core wall surface. In contrast with conventional macroscopic atomic cell configuration, and in agreement with Monte Carlo simulations, the measured relaxation times were found to be at least one order of magnitude longer than the limit set by atom-wall collisional from thermal atoms. This extended relaxation time is explained by the combination of a stronger contribution of the slow atoms in the atomic polarization build-up, and of the relatively significant contribution of dwell time to the relaxation process of the ground state polarization.

Original languageEnglish
Article number185401
Number of pages9
JournalJournal of Physics B: Atomic, Molecular and Optical Physics
Volume49
Issue number18
DOIs
Publication statusPublished - 7 Sep 2016
Externally publishedYes

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