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25 April 2024 |
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Article overview
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Single-atom-sensitive fluorescence imaging of ultracold quantum gases | | R. Bücker
; A. Perrin
; S. Manz
; T. Betz
; Ch. Koller
; T. Plisson
; J. Rottmann
; T. Schumm
; J. Schmiedmayer
; | | Date: |
3 Jul 2009 | | Abstract: | We present a novel imaging system for ultracold quantum gases in expansion.
After release from a confining potential, atoms fall through a sheet of
resonant excitation laser light and the emitted fluorescence photons are imaged
onto an amplified CCD camera using a high numerical aperture optical system.
The imaging system reaches an extraordinary dynamic range, not attainable with
conventional absorption imaging. We demonstrate single-atom detection for
dilute atomic clouds with high efficiency where at the same time dense
Bose-Einstein condensates can be imaged without saturation or distortion. The
spatial resolution can reach the sampling limit as given by the 8 microns pixel
size in object space. Pulsed operation of the detector allows for slice images
and hence a 3D tomography of the measured object. The scheme can easily be
implemented for any atomic species and all optical components are situated
outside the vacuum system. As a first application we perform thermometry on
rubidium Bose-Einstein condensates created on an atom chip. | | Source: | arXiv, 0907.0674 | | Services: | Forum | Review | PDF | Favorites | |
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