Point singularity array with metasurfaces for blue-detuned atomic traps

Soon Wei Daniel Lim; Joon-Suh Park; Dmitry Kazakov; Christina M. Spaegele; Ahmed H Dorrah; Maryna L. Meretska; Federico Capasso

doi:10.1117/12.2676740

5 October 2023 Point singularity array with metasurfaces for blue-detuned atomic traps

Soon Wei Daniel Lim, Joon-Suh Park, Dmitry Kazakov, Christina M. Spaegele, Ahmed H Dorrah, Maryna L. Meretska, Federico Capasso

Author Affiliations +

Proceedings Volume PC12649, Optical Trapping and Optical Micromanipulation XX; PC126490U (2023) https://doi.org/10.1117/12.2676740
Event: SPIE Nanoscience + Engineering, 2023, San Diego, California, United States

Abstract

Phase singularities are loci of darkness surrounded by light in a scalar field. We engineer an array of closely-spaced identical point singularities structured along the optic axis. The array is experimentally realized with a TiO2 metasurface under 760 nm narrowband illumination. We study possible application in blue-detuned neutral atom trap arrays, for which this field would enforce 3D confinement and a potential depth around 0.22 mK per watt of trapping power. The field is tolerant to around 10 nm changes in wavelength with a 0.11 degree angular bandwidth. Metasurface-enabled point singularity engineering may simplify and miniaturize the architecture required for super-resolution microscopes and dark traps.

Conference Presentation

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Soon Wei Daniel Lim, Joon-Suh Park, Dmitry Kazakov, Christina M. Spaegele, Ahmed H Dorrah, Maryna L. Meretska, and Federico Capasso "Point singularity array with metasurfaces for blue-detuned atomic traps", Proc. SPIE PC12649, Optical Trapping and Optical Micromanipulation XX, PC126490U (5 October 2023); https://doi.org/10.1117/12.2676740

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