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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry van Driel
  • Vol. 28, Iss. 1 — Jan. 1, 2011
  • pp: 10–17

Two-dimensional atom localization via controlled spontaneous emission from a driven tripod system

Ren-Gang Wan, Jun Kou, Li Jiang, Yun Jiang, and Jin-Yue Gao  »View Author Affiliations


JOSA B, Vol. 28, Issue 1, pp. 10-17 (2011)
http://dx.doi.org/10.1364/JOSAB.28.000010


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Abstract

A scheme for two-dimensional (2D) subwavelength atom localization is proposed, in which the atom is in a four-level tripod configuration and driven by two orthogonal standing-wave lasers. Because of the spatial dependence of atom–field interaction, the spontaneously emitted photon carries information about the position of the atom in standing-wave fields. We exploit this fact to 2D atom localization conditioned on the measurement of spontaneously emitted photon at a particular frequency, and obtain a high precision and resolution in the position probability distribution. Moreover, an improvement by a factor of 2 in the detecting probability of an atom can be achieved by initially preparing the atom in the coherent population trapping state. Qualitatively, the high- precision, high-resolution atom localization can be attributed to the quantum interference effect between competitive multiple spontaneous decay channels.

© 2011 Optical Society of America

OCIS Codes
(020.1670) Atomic and molecular physics : Coherent optical effects
(270.1670) Quantum optics : Coherent optical effects

ToC Category:
Quantum Optics

History
Original Manuscript: August 26, 2010
Revised Manuscript: October 5, 2010
Manuscript Accepted: October 29, 2010
Published: December 6, 2010

Citation
Ren-Gang Wan, Jun Kou, Li Jiang, Yun Jiang, and Jin-Yue Gao, "Two-dimensional atom localization via controlled spontaneous emission from a driven tripod system," J. Opt. Soc. Am. B 28, 10-17 (2011)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-28-1-10

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