Collective atomic scattering and motional effects in a dense coherent medium
Name
Bromley-2016-Collective atomic.pdf
Size
691.31 KB
Format
Adobe PDF
Checksum (MD5)
4b3d6b572f1e9fdef5c523f7860ab295
Author(s)
Bromley, S. L.
Zhu, B.
Bishof, M.
Zhang, X.
Bothwell, T.
Schachenmayer, J.
Kaiser, R.
Yelin, S. F.
Lukin, M. D.
Rey, A. M.
Date Issued
March 2016
Journal
Nature Communications
Publisher
Nature Publishing Group
Citation
Bromley, S. L. et al. “Collective Atomic Scattering and Motional Effects in a Dense Coherent Medium.” Nature Communications 7 (2016): 11039. © 2017 Macmillan Publishers Limited
Version
Final published version
Abstract
We investigate collective emission from coherently driven ultracold [superscript 88]Sr atoms. We perform two sets of experiments using a strong and weak transition that are insensitive and sensitive, respectively, to atomic motion at 1 μK. We observe highly directional forward emission with a peak intensity that is enhanced, for the strong transition, by >10[superscript 3] compared with that in the transverse direction. This is accompanied by substantial broadening of spectral lines. For the weak transition, the forward enhancement is substantially reduced due to motion. Meanwhile, a density-dependent frequency shift of the weak transition (∼10% of the natural linewidth) is observed. In contrast, this shift is suppressed to <1% of the natural linewidth for the strong transition. Along the transverse direction, we observe strong polarization dependences of the fluorescence intensity and line broadening for both transitions. The measurements are reproduced with a theoretical model treating the atoms as coherent, interacting radiating dipoles.
MIT Department
Massachusetts Institute of Technology. Research Laboratory of Electronics
MIT-Harvard Center for Ultracold Atoms
Terms of Use
Creative Commons Attribution
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1038/ncomms11039
