Paper
24 November 2023 Comparison of light scattering and dispersion features of nanoparticles manipulated by pulsed and continuous optical tweezers
Xin Yao, Lingyao Yu, Sen Geng, Kesong Yan, Jun Yin
Author Affiliations +
Proceedings Volume 12935, Fourteenth International Conference on Information Optics and Photonics (CIOP 2023); 1293544 (2023) https://doi.org/10.1117/12.3007912
Event: Fourteenth International Conference on Information Optics and Photonics (CIOP 2023), 2023, Xi’an, China
Abstract
The precise capture and control of nanoparticles by using optical tweezers has become a hot research topic in the field of nano-optics. Especially, the pulsed tweezers have been robustly used to manipulate the nanoparticles because of the high peak power, compared with the continuous optical tweezers. It is still not yet clear that the difference of light scattering by the nanoparticle in the pulsed and continuous optical tweezers, as well as different dispersion processes. In this work, we constructed a finite element model of a nanoparticle and calculated the light scattering and dispersion by the particle irradiated by the pulsed (femtosecond and picosecond lasers) and continuous trapping beams with the same average power, respectively. Both pulsed and continuous optical tweezers were defined as the highly focused, Gaussian distributed, radial polarized and spherical electromagnetic field. Nanoparticles were chosen to be golden particles. We discussed the electromagnetic field evolution, the particle size effects on the energy loss, and the near field distribution. The simulation results offer the significant information for choosing the best laser source for efficient manipulations and other related fields.
(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.
Xin Yao, Lingyao Yu, Sen Geng, Kesong Yan, and Jun Yin "Comparison of light scattering and dispersion features of nanoparticles manipulated by pulsed and continuous optical tweezers", Proc. SPIE 12935, Fourteenth International Conference on Information Optics and Photonics (CIOP 2023), 1293544 (24 November 2023); https://doi.org/10.1117/12.3007912
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KEYWORDS
Electric fields

Optical tweezers

Pulsed laser operation

Light scattering

Particles

Laser irradiation

Optical spheres

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