Phase-space properties of magneto-optical traps utilising micro-fabricated gratings

McGilligan, J. P. and Griffin, P. F. and Riis, E. and Arnold, A. S. (2015) Phase-space properties of magneto-optical traps utilising micro-fabricated gratings. Optics Express, 23 (7). pp. 8948-8959. ISSN 1094-4087

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    Abstract

    We have used diffraction gratings to simplify the fabrication, and dramatically increase the atomic collection efficiency, of magneto-optical traps using micro-fabricated optics. The atom number enhancement was mainly due to the increased beam capture volume, afforded by the large area (4cm^2) shallow etch (200nm) binary grating chips. Here we provide a detailed theoretical and experimental investigation of the on-chip magneto-optical trap temperature and density in four different chip geometries using 87Rb, whilst studying effects due to MOT radiation pressure imbalance. With optimal initial MOTs on two of the chips we obtain both large atom number (2x10^7) _and_ sub-Doppler temperatures (50uK) after optical molasses.

    Author(s):McGilligan, J. P. ORCID logoORCID: https://orcid.org/0000-0002-6514-9696, Griffin, P. F. ORCID logoORCID: https://orcid.org/0000-0002-0134-7554, Riis, E. ORCID logoORCID: https://orcid.org/0000-0002-3225-5302 and Arnold, A. S. ORCID logoORCID: https://orcid.org/0000-0001-7084-6958
    Item type:Article
    ID code:52282
    Keywords:optical traps, micro-fabricated optics, optical trap temperature, beam capture, Optics. Light, Atomic and Molecular Physics, and Optics
    Subjects:Science > Physics > Optics. Light
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:31 Mar 2015 07:19
    Last modified:01 Sep 2019 00:55
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/52282
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