AtomSpiegel und Wellenleiter

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Atom-Spiegel und Wellenleiter
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Specular reflection
V. Savalli, D. Stevens, J. Estève, P. D.
Featonby, V. Josse, N. Westbrook, C. I.
Westbrook, and A. Aspect Phys. Rev. Lett. 88,
250404 (2002)
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Der Ball ist rund!
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Kalte Atome springen
h R/4
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Atome fallen im Experiment
Atome
Ca. 1 Mio. Rb Atome T 10 mK h 13.5
mm Fallzeit 50 ms Atomspiegel
Videoband Hohlspiegel Zur Fokussierung
13.5 mm
magnetisches Videoband
SCOAP
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Atomspiegel
h R/2
27 mm
Atome als Oberflächensensor? periodisch
strukturierte Oberfläche (d10 mm)
SCOAP
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Atome an unebenen Oberflächen
h R/2
Atome als Oberflächensensor? periodisch
strukturierte Oberfläche (d10 mm)
SCOAP
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cw source for integrated atom optics
flexible waveguide
cw source
integrated detector
d lt 1mm
D. Schneble M. Hasuo Th. Anker
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Ar Loading by optical pumping
lt 1mm from surface few modes only
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Ar Loading by optical pumping
h6mm
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Cw loading from a reservoir at the surface
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Ar Loading by optical pumping
lt 1mm from surface few modes only
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Detection of metastables on surfaces
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Gold surface Reflectivity 0.4 h 6 mm v35
cm/sec
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A quasi 2D gas of laser cooled atoms
secondary electrons Single atom detector
H. Gauck, et al. Phys. Rev. Lett. 81, 5298 (1998)
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Setup
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MOST surface approach
Without Refl.

• 500 MHz
• I P/(6 mm2)

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Cw loading of the waveguide
MOST center 0.5 mm below surface WG dl1.2 nm
red detuned
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Linear wave guide Beam shutter
1 mm
cyl. focussed laser forms linear waveguide
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Linear waveguide on surface
red detuned cyl. beam dl1.2 nm forms linear
waveguide
Load for 200 ms open shutter
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Single well ?
surface sensitive detection
ev. attraction field red detuned
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Surface sensitive detection
WG off
WG off