Optical levitation with a metasurface lens

Tongcang Li

doi:10.1117/12.2635921

3 October 2022 Optical levitation with a metasurface lens

Tongcang Li

Proceedings Volume PC12198, Optical Trapping and Optical Micromanipulation XIX; PC121980I (2022) https://doi.org/10.1117/12.2635921
Event: SPIE Nanoscience + Engineering, 2022, San Diego, California, United States

Abstract

An optically levitated nanoparticle in a vacuum is excellent for precision measurements. We have optically levitated silica nanodumbbells in a vacuum and driven them to rotate beyond 5 GHz. With an optically levitated nanorotor, we demonstrated a torque sensor with a record-high sensitivity [Nature Nanotechnology, 15, 89 (2020)]. Recently, we designed and fabricated an ultrathin metalens with a high numerical aperture (NA=0.88) and used it to levitate a nanoparticle in a vacuum [Optica, 8, 1359 (2021)]. Such a system will provide opportunities for on-chip sensing. In addition, we have trapped a nanodumbbell near a surface with a separation of less than one micrometer, and used it to demonstrate an optically levitated scanning probe microscope beyond the diffraction limit. Our work will be important for studying quantum surface interactions.

Conference Presentation

Citation Download Citation

Tongcang Li "Optical levitation with a metasurface lens", Proc. SPIE PC12198, Optical Trapping and Optical Micromanipulation XIX, PC121980I (3 October 2022); https://doi.org/10.1117/12.2635921

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