Absorption imaging of ultracold atoms on atom chips.

@article{Smith2011AbsorptionIO,
  title={Absorption imaging of ultracold atoms on atom chips.},
  author={David Adu Smith and Simon Aigner and Sebastian Hofferberth and Michael P. Gring and Mauritz Andersson and S. Wildermuth and Peter Kr{\"u}ger and Stephan Schneider and Thorsten Schumm and J{\"o}rg Schmiedmayer},
  journal={Optics express},
  year={2011},
  volume={19 9},
  pages={
          8471-85
        }
}
Imaging ultracold atomic gases close to surfaces is an important tool for the detailed analysis of experiments carried out using atom chips. We describe the critical factors that need be considered, especially when the imaging beam is purposely reflected from the surface. In particular we present methods to measure the atom-surface distance, which is a prerequisite for magnetic field imaging and studies of atom surface-interactions. 

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References

SHOWING 1-10 OF 52 REFERENCES

Guiding neutral atoms on a chip

TLDR
The guiding of neutral atoms by the magnetic fields due to microfabricated current-carrying wires on a chip is demonstrated and can be extended to integrated atom optics circuits, including beam splitters.

Multilayer atom chips for versatile atom micromanipulation

We employ a combination of optical and electron-beam lithography to create an atom chip combining submicron wire structures with larger conventional wires on a single substrate. The multilayer

Single-particle-sensitive imaging of freely propagating ultracold atoms

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

Beam splitter for guided atoms.

TLDR
A simple beam splitter for guided atoms realized with a current carrying Y-shaped wire nanofabricated on a surface (atom chip) has many advantages compared to conventional designs based on tunneling, especially that it will enable robust beam splitting.

Surface effects in magnetic microtraps

We have investigated Bose-Einstein condensates and ultracold atoms in the vicinity of a surface of a magnetic microtrap. The atoms are prepared along copper conductors at distances to the surface

ATOMIC MICROMANIPULATION WITH MAGNETIC SURFACE TRAPS

We describe manipulation of neutral atoms using the magnetic field of microfabricated currentcarrying conductors. It is shown how this method can be used to achieve adiabatic magnetic transport from

Atom chips: Fabrication and thermal properties

Neutral atoms can be trapped and manipulated with surface mounted microscopic current carrying and charged structures. We present a lithographic fabrication process for such atom chips based on

Coherence in microchip traps.

TLDR
The coherent manipulation of internal states of neutral atoms in a magnetic microchip trap is reported, and a miniaturized atomic clock with a relative stability in the 10(-13) range can be realized.

Combined chips for atom optics

We present experiments with Bose-Einstein condensates on a combined atom chip. The combined structure consists of a large-scale ``carrier chip'' and smaller ``atom-optics chips,'' containing
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