We report on progress towards a single atom, single photon source using a fiber connected optical chip. Quantum experiments with cold atoms are burdened by the complexity of the experimental apparatus. Using fiber connectorized optics and a grating MOT suitable for cooling Rb atoms we fabricate a pre-aligned device usable as a single photon source for quantum communication experiments. The device integrates a grating MOT with a single beam dipole trap produced by a fiber and GRIN lens combination. MOT atoms are loaded into the dipole trap and then used as a source of single photons which are collected by the same optical fiber. We will report on details of the fabrication of the optical chip, experimental characterization, and progress towards generating high purity single photons.
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A fully-integrated single-photon source based on single Rb atoms
We describe recent work towards a fully-integrated single-photon source based on the use of single atoms captured from a grating magneto-optical trap (GMOT). Single Rb atoms
from a ber-coupled GMOT will be loaded into an optical dipole trap formed by
light from an integrated polarization-maintaining (PM) ber. Trapped single atoms
will be excited to the 2P1/2 state using resonant light. The resulting single-photon
fluorescence will be collected through the same PM ber as is used for trapping, and
routed to further experiments. We describe progress towards an intermediate imple-
mentation incorporating integrated optical bers and free space light sources. The
completed, fully-integrated single-photon source will have numerous applications in
quantum communications and quantum information processing, and particularly in
improvement of the performance of quantum key distribution systems.
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- Award ID(s):
- 1839176
- NSF-PAR ID:
- 10097631
- Date Published:
- Journal Name:
- 50th Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics APS Meeting
- Format(s):
- Medium: X
- Sponsoring Org:
- National Science Foundation
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