Lamb-Dicke spectroscopy of atoms in a hollow-core photonic crystal fibre

Shoichi Okaba, Tetsushi Takano, Fetah Benabid, Tom Bradley, Luca Vincetti, Zakhar Maizelis, Valery Yampol'skii, Franco Nori and Hidetoshi Katori ()
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Shoichi Okaba: Graduate School of Engineering, The University of Tokyo
Tetsushi Takano: Graduate School of Engineering, The University of Tokyo
Fetah Benabid: GPPMM group, Xlim Research Institute
Tom Bradley: GPPMM group, Xlim Research Institute
Luca Vincetti: GPPMM group, Xlim Research Institute
Zakhar Maizelis: A.Ya. Usikov Institute for Radiophysics and Electronics, National Academy of Science of Ukraine
Valery Yampol'skii: A.Ya. Usikov Institute for Radiophysics and Electronics, National Academy of Science of Ukraine
Franco Nori: CEMS, RIKEN
Hidetoshi Katori: Graduate School of Engineering, The University of Tokyo

Nature Communications, 2014, vol. 5, issue 1, 1-9

Abstract: Abstract Unlike photons, which are conveniently handled by mirrors and optical fibres without loss of coherence, atoms lose their coherence via atom–atom and atom–wall interactions. This decoherence of atoms deteriorates the performance of atomic clocks and magnetometers, and also hinders their miniaturization. Here we report a novel platform for precision spectroscopy. Ultracold strontium atoms inside a kagome-lattice hollow-core photonic crystal fibre are transversely confined by an optical lattice to prevent atoms from interacting with the fibre wall. By confining at most one atom in each lattice site, to avoid atom–atom interactions and Doppler effect, a 7.8-kHz-wide spectrum is observed for the 1S0−3P1(m=0) transition. Atoms singly trapped in a magic lattice in hollow-core photonic crystal fibres improve the optical depth while preserving atomic coherence time.

Date: 2014
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DOI: 10.1038/ncomms5096

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