Membrane MOT: Trapping Dense Cold Atoms in a Sub-Millimeter Diameter Hole of a Microfabricated Membrane Device

  title={Membrane MOT: Trapping Dense Cold Atoms in a Sub-Millimeter Diameter Hole of a Microfabricated Membrane Device},
  author={Jongmin Lee and Grant W. Biedermann and John P. Mudrick and Erica A. Douglas and Y-Y Jau},
  journal={arXiv: Quantum Physics},
We present a demonstration of keeping a cold-atom ensemble within a sub-millimeter diameter hole in a transparent membrane. Based on the effective beam diameter of the magneto-optical trap (MOT) given by the hole diameter (d = 400 um), we measure an atom number that is 10^5 times higher than the predicted value using the conventional d^6 scaling rule. Atoms trapped by the membrane MOT are cooled down to 10 mK with sub-Doppler cooling. Such a device can be potentially coupled to the photonic… 

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