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Title: Multiple reflections and diffuse scattering in Bragg scattering at optical lattices

Abstract

We study Bragg scattering at one-dimensional atomic lattices. Cold atoms are confined by optical dipole forces at the antinodes of a standing wave generated inside a laser-driven cavity. The atoms arrange themselves into an array of lens-shaped layers located at the antinodes of the standing wave. Light incident on this array at a well-defined angle is partially Bragg reflected. We measure reflectivities as high as 30%. In contrast to a previous experiment devoted to the thin grating limit [S. Slama et al., Phys. Rev. Lett. 94, 193901 (2005)] we now investigate the thick grating limit characterized by multiple reflections of the light beam between the atomic layers. In principle, multiple reflections give rise to a photonic stop band, which manifests itself in the Bragg diffraction spectra as asymmetries and minima due to destructive interference between different reflection paths. We show that close to resonance however disorder favors diffuse scattering, hinders coherent multiple scattering and impedes the characteristic suppression of spontaneous emission inside a photonic band gap.

Authors:
; ; ; ;  [1]
  1. Physikalisches Institut, Eberhard-Karls-Universitaet Tuebingen, Auf der Morgenstelle 14, D-72076, Tuebingen (Germany)
Publication Date:
OSTI Identifier:
20979299
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. A; Journal Volume: 73; Journal Issue: 2; Other Information: DOI: 10.1103/PhysRevA.73.023424; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; ASYMMETRY; ATOMS; BRAGG REFLECTION; DIFFUSE SCATTERING; DIPOLES; EMISSION; INTERFERENCE; LIGHT SCATTERING; MULTIPLE SCATTERING; ONE-DIMENSIONAL CALCULATIONS; REFLECTIVITY; RESONANCE; SPECTRA; STANDING WAVES; VISIBLE RADIATION

Citation Formats

Slama, S., Cube, C. von, Kohler, M., Zimmermann, C., and Courteille, Ph. W.. Multiple reflections and diffuse scattering in Bragg scattering at optical lattices. United States: N. p., 2006. Web. doi:10.1103/PHYSREVA.73.023424.
Slama, S., Cube, C. von, Kohler, M., Zimmermann, C., & Courteille, Ph. W.. Multiple reflections and diffuse scattering in Bragg scattering at optical lattices. United States. doi:10.1103/PHYSREVA.73.023424.
Slama, S., Cube, C. von, Kohler, M., Zimmermann, C., and Courteille, Ph. W.. Wed . "Multiple reflections and diffuse scattering in Bragg scattering at optical lattices". United States. doi:10.1103/PHYSREVA.73.023424.
@article{osti_20979299,
title = {Multiple reflections and diffuse scattering in Bragg scattering at optical lattices},
author = {Slama, S. and Cube, C. von and Kohler, M. and Zimmermann, C. and Courteille, Ph. W.},
abstractNote = {We study Bragg scattering at one-dimensional atomic lattices. Cold atoms are confined by optical dipole forces at the antinodes of a standing wave generated inside a laser-driven cavity. The atoms arrange themselves into an array of lens-shaped layers located at the antinodes of the standing wave. Light incident on this array at a well-defined angle is partially Bragg reflected. We measure reflectivities as high as 30%. In contrast to a previous experiment devoted to the thin grating limit [S. Slama et al., Phys. Rev. Lett. 94, 193901 (2005)] we now investigate the thick grating limit characterized by multiple reflections of the light beam between the atomic layers. In principle, multiple reflections give rise to a photonic stop band, which manifests itself in the Bragg diffraction spectra as asymmetries and minima due to destructive interference between different reflection paths. We show that close to resonance however disorder favors diffuse scattering, hinders coherent multiple scattering and impedes the characteristic suppression of spontaneous emission inside a photonic band gap.},
doi = {10.1103/PHYSREVA.73.023424},
journal = {Physical Review. A},
number = 2,
volume = 73,
place = {United States},
year = {Wed Feb 15 00:00:00 EST 2006},
month = {Wed Feb 15 00:00:00 EST 2006}
}