dorsal/arxiv
View SchemaMultiple Reflections and Diffuse Scattering in Bragg Scattering at Optical Lattices
| Authors | S. Slama, C. von Cube, M. Kohler, C. Zimmermann, Ph. W. Courteille |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0511258 |
| URL | https://arxiv.org/abs/quant-ph/0511258 |
| DOI | 10.1103/PhysRevA.73.023424 |
Abstract
We study Bragg scattering at 1D 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.
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"abstract": "We study Bragg scattering at 1D atomic lattices. Cold atoms are confined by\noptical dipole forces at the antinodes of a standing wave generated inside a\nlaser-driven cavity. The atoms arrange themselves into an array of lens-shaped\nlayers located at the antinodes of the standing wave. Light incident on this\narray at a well-defined angle is partially Bragg-reflected. We measure\nreflectivities as high as 30%. In contrast to a previous experiment devoted to\nthe thin grating limit [S. Slama, et al., Phys. Rev. Lett. 94, 193901 (2005)]\nwe now investigate the thick grating limit characterized by multiple\nreflections of the light beam between the atomic layers. In principle multiple\nreflections give rise to a photonic stop band, which manifests itself in the\nBragg diffraction spectra as asymmetries and minima due to destructive\ninterference between different reflection paths. We show that close to\nresonance however disorder favors diffuse scattering, hinders coherent multiple\nscattering and impedes the characteristic suppression of spontaneous emission\ninside a photonic band gap.",
"arxiv_id": "quant-ph/0511258",
"authors": [
"S. Slama",
"C. von Cube",
"M. Kohler",
"C. Zimmermann",
"Ph. W. Courteille"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.73.023424",
"title": "Multiple Reflections and Diffuse Scattering in Bragg Scattering at Optical Lattices",
"url": "https://arxiv.org/abs/quant-ph/0511258"
},
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