Results of Talbot-vonLau atom interferometry experiments with cold slow potassium
- Univ. of Caifornia, Berkely, CA (United States)
Results of atom interferometry experiments in generalized Talbot-vonLau configurations are presented. AC modulated D2 light from diode lasers is counter-directed on a thermal potassium beam. A pA AC current of cold, slow potassium atoms is extracted through a slit in a heated mirror, transmitted through an interferometer, and ionized by a hotwire. The interferometer consists of a sequence of three planar vacuum slit diffraction gratings, microfabricated from silicon nitride membranes. Interference fringes form a Moire with the third grating and are sensed by measuring the transmission as a function of grating relative position. Different spatial Fourier components (up to 5th) in the diffraction pattern, resonant in the interferometer at different atomic velocities, may be selected via the tuning of the cooling lasers. Shifts of the patterns by gravity and rotation are evident when the vacuum chamber is tilted.
- OSTI ID:
- 281354
- Report Number(s):
- CONF-9305421--
- Journal Information:
- Bulletin of the American Physical Society, Journal Name: Bulletin of the American Physical Society Journal Issue: 3 Vol. 38; ISSN 0003-0503; ISSN BAPSA6
- Country of Publication:
- United States
- Language:
- English
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