Towards absolute cooling of levitated nanoparticles

Cyril Laplane; Peng Ren; Reece R. Roberts; Yiqing Lu; Thomas Volz

doi:10.1117/12.2678380

5 October 2023 Towards absolute cooling of levitated nanoparticles

Cyril Laplane, Peng Ren, Reece R. Roberts, Yiqing Lu, Thomas Volz

Proceedings Volume PC12649, Optical Trapping and Optical Micromanipulation XX; PC126490P (2023) https://doi.org/10.1117/12.2678380
Event: SPIE Nanoscience + Engineering, 2023, San Diego, California, United States

Abstract

Levitated mesoscopic particles, with their intrinsic low coupling to the environment, are ideally suited as hybrid quantum platforms of mesoscopic size and mass. In vacuum, the only coupling to the environment is the levitation field itself, resulting in a mechanical oscillator with a very high-quality factor. Optically levitated systems in vacuum have recently entered the quantum realm with demonstration of cooling to the motional quantum ground state using passive and active feedback methods. The levitated particles in most of these experiments are optically inert such as SiO2 nanospheres. Here we are interested in studying and developing techniques suitable for the stable levitation of optically active nanoparticles such as rare-earth ion activated nanocrystals. In particular we will show experimental results on the laser refrigeration of levitated nanocrystals down to 150K and our efforts towards using measurement-based oscillator control for the absolute cooling of the levitated particle.

Conference Presentation

Citation Download Citation

Cyril Laplane, Peng Ren, Reece R. Roberts, Yiqing Lu, and Thomas Volz "Towards absolute cooling of levitated nanoparticles", Proc. SPIE PC12649, Optical Trapping and Optical Micromanipulation XX, PC126490P (5 October 2023); https://doi.org/10.1117/12.2678380

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