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Proceedings Paper

All-optical manipulation of neutral atomic ensembles
Author(s): W. T. Hill; N. Chattrapiban; I. V. Arakelyan; S. Mitra; Y. Song
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Paper Abstract

The longitudinal and transverse evolution of thermal clouds have been studied experimentally and theoretically in blue-detuned hollow tunnels. Tunnels based on axicon generation and holographic phase-mask generation have been investigated. A simple model is presented that (1) accounts for longitudinal acceleration and (2) shows that a cloud confined in a tunnel with a potential having a Bessel mode distribution will absorb fewer photons than it would confined in a comparable tunnel with a Laguerre-Gaussian mode distribution. The longitudinal and transverse profiles are fit to analytical distributions functions from which we extract transverse and longitudinal temperatures of the cloud. We find the two temperatures to be very different, with the transverse temperature being as much as five times colder. Finally, we studied the energy level structure within a Bessel potential theoretically and found that single-mode propagation is possible.

Paper Details

Date Published: 5 September 2007
PDF: 10 pages
Proc. SPIE 6644, Optical Trapping and Optical Micromanipulation IV, 664411 (5 September 2007); doi: 10.1117/12.739785
Show Author Affiliations
W. T. Hill, Univ. of Maryland, College Park (United States)
N. Chattrapiban, Univ. of Maryland, College Park (United States)
I. V. Arakelyan, Univ. of Maryland, College Park (United States)
S. Mitra, Univ. of Maryland, College Park (United States)
Y. Song, Univ. of Maryland, College Park (United States)


Published in SPIE Proceedings Vol. 6644:
Optical Trapping and Optical Micromanipulation IV
Kishan Dholakia; Gabriel C. Spalding, Editor(s)

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