Trapped atoms and superradiance on an integrated nanophotonic microring circuit

• URL: http://arxiv.org/abs/2312.14318v2
• Date: Fri, 21 Jun 2024 14:47:18 GMT
• Title: Trapped atoms and superradiance on an integrated nanophotonic microring circuit
• Authors: Xinchao Zhou, Hikaru Tamura, Tzu-Han Chang, Chen-Lung Hung,
• Abstract summary: Interfacing cold atoms with integrated nanophotonic devices could offer new paradigms for engineering atom-light interactions. We demonstrate direct loading of an ensemble of up to 70 atoms into an optical microtrap on a nanophotonic microring circuit. Our technique can be extended to trapping a large ensemble of cold atoms on nanophotonic circuits for various quantum applications.
• Score: 0.0
• License: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Abstract: Interfacing cold atoms with integrated nanophotonic devices could offer new paradigms for engineering atom-light interactions and provide a potentially scalable route for quantum sensing, metrology, and quantum information processing. However, it remains a challenging task to efficiently trap a large ensemble of cold atoms on an integrated nanophotonic circuit. Here, we demonstrate direct loading of an ensemble of up to 70 atoms into an optical microtrap on a nanophotonic microring circuit. Efficient trap loading is achieved by employing degenerate Raman-sideband cooling in the microtrap, where a built-in spin-motion coupling arises directly from the vector light shift of the evanescent field potential on a microring. Atoms are cooled into the trap via optical pumping with a single free space beam. We have achieved a trap lifetime approaching 700ms under continuous cooling. We show that the trapped atoms display large cooperative coupling and superradiant decay into a whispering-gallery mode of the microring resonator, holding promise for explorations of new collective effects. Our technique can be extended to trapping a large ensemble of cold atoms on nanophotonic circuits for various quantum applications.

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