A dielectric metasurface for the generation of cold atoms

Zixian Hu; Guixin Li

doi:10.1117/12.3017045

6 June 2024 A dielectric metasurface for the generation of cold atoms

Zixian Hu, Guixin Li

Proceedings Volume PC12990, Metamaterials XIV; PC1299020 (2024) https://doi.org/10.1117/12.3017045
Event: SPIE Photonics Europe, 2024, Strasbourg, France

Conference Poster

Abstract

The single-beam MOT system based on the diffractive optical element offers a new route to develop compact cold atom sources, which, however, suffers from the low optical efficiency and unbalanced beam intensity distribution. To solve this issue, we developed a centimeter-scale dielectric metasurface optical chip with dynamic phase distributions, which was used to split a single incident laser beam into five separate ones with well-defined polarization states, high efficiency and uniform energy distributions. The measured diffraction efficiency of the metasurface is up to 47%. A single-beam MOT integrated with the metasurface optical chip was then used to trap the 87Rb atoms with numbers approximately 1.4 × 10⁸ and temperatures approximately 7 μK, exhibiting better performance in cooling and trapping of atoms compared to the grating MOT and the early version of the metasurface MOTs.

Citation Download Citation

Zixian Hu and Guixin Li "A dielectric metasurface for the generation of cold atoms", Proc. SPIE PC12990, Metamaterials XIV, PC1299020 (6 June 2024); https://doi.org/10.1117/12.3017045

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