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Proceedings Paper

Femtosecond laser trapping, assembling, and ejection dynamics of dielectric nanoparticles in solution
Author(s): Hiroshi Masuhara; Jim Jui-Kai Chen; Wei-Yi Chiang; Anwar Usman; Teruki Sugiyama; Johan Hofkens
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Paper Abstract

We elucidated femtosecond laser trapping dynamics of Rayleigh particles by modifying the surface property of nanoparticles and changing the viscosity. Through bright field, dark field and backscattering images, we monitored ejection behavior of nanoparticles which takes place in the direction perpendicular to laser polarization and switched from one side to the other. For very hydrophobic nanoparticle, we succeeded in observing directly a transient assembly and confirmed that its formation is responsible to the directional ejection. Also the trapping dynamics was compared for femtosecond and continuous-wave lasers in highly viscous solvent, which gives a new viewpoint for understanding femtosecond laser trapping mechanism.

Paper Details

Date Published: 24 April 2018
PDF: 6 pages
Proc. SPIE 10712, Optical Manipulation Conference, 1071202 (24 April 2018); doi: 10.1117/12.2318416
Show Author Affiliations
Hiroshi Masuhara, National Chiao Tung Univ. (Taiwan)
Jim Jui-Kai Chen, National Chiao Tung Univ. (Taiwan)
Wei-Yi Chiang, National Chiao Tung Univ. (Taiwan)
Katholieke Univ. Leuven (Belgium)
Anwar Usman, Univ. Brunei Darussalam (Brunei Darussalam)
Teruki Sugiyama, National Chiao Tung Univ. (Taiwan)
Nara Institute of Science and Technology (Japan)
Johan Hofkens, Katholieke Univ. Leuven (Belgium)

Published in SPIE Proceedings Vol. 10712:
Optical Manipulation Conference
Takashige Omatsu; Hajime Ishihara; Keiji Sasaki, Editor(s)

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