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1 August 2021 Trapping nanoparticles with optical refrigeration
Jingang Li, Yuebing Zheng
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Proceedings Volume 11798, Optical Trapping and Optical Micromanipulation XVIII; 117981W (2021) https://doi.org/10.1117/12.2595047
Event: SPIE Nanoscience + Engineering, 2021, San Diego, California, United States
Abstract
We develop a new type of optical tweezers that exploits thermophoresis and solid-state optical refrigeration to trap and manipulate nanoparticles at the laser-generated cold region. Localized optical refrigeration of a solid substrate creates a temperature gradient field to trap nanoparticles and molecules with common thermophobic nature at the laser beam center by thermophoresis. The trapping of objects at the low-temperature region can effectively avoid photothermal degradation. In addition, compared to conventional optical tweezers, our tweezers require a weakly focused laser beam with a lower optical intensity to trap fragile objects, which can reduce the photodamages.
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Jingang Li and Yuebing Zheng "Trapping nanoparticles with optical refrigeration", Proc. SPIE 11798, Optical Trapping and Optical Micromanipulation XVIII, 117981W (1 August 2021); https://doi.org/10.1117/12.2595047
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KEYWORDS
Nanoparticles
Optical tweezers
Particles
Nanomaterials
Nanotechnology
Optical manipulation
Optical trapping
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