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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.

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: 25 May 2018 12:21
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URI: https://strathprints.strath.ac.uk/id/eprint/52282
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