Optical levitation and manipulation of nano-objects

Maryam Nikkhou; Yanhui Hu; James Sabin; James Millen

doi:10.1117/12.2595845

1 August 2021 Optical levitation and manipulation of nano-objects

Maryam Nikkhou, Yanhui Hu, James Sabin, James Millen

Proceedings Volume 11798, Optical Trapping and Optical Micromanipulation XVIII; 117980V (2021) https://doi.org/10.1117/12.2595845
Event: SPIE Nanoscience + Engineering, 2021, San Diego, California, United States

Abstract

We present a clean, vacuum compatible method for loading nanoparticles into optical traps, based on laser-induced acoustic desorption (LIAD). We investigate the effect of the particle loading conditions and the optical trap power on trapping efficiency for an optical standing wave trap in vacuum. Furthermore, cooling all translational and rotational degrees of freedom of a levitated particle with anisotropic susceptibility is demonstrated. A silicon nanorod is trapped in the standing wave field in ultra-high vacuum. Due to the anisotropy of the susceptibility tensor, the nanorod has an enhanced interaction with the light field as compared to a spherical particle of the same volume. These non-spherical nanoparticles are also sensitive to the polarization of the light. We aim to cool the librational motion of the particle by controlling the polarization of the trapping light field and explore whether manipulation via polarization will produce more efficient cooling than other methods.

Conference Presentation

Citation Download Citation

Maryam Nikkhou, Yanhui Hu, James Sabin, and James Millen "Optical levitation and manipulation of nano-objects", Proc. SPIE 11798, Optical Trapping and Optical Micromanipulation XVIII, 117980V (1 August 2021); https://doi.org/10.1117/12.2595845

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