Laser trapping dynamics of 200 nm-polystyrene particles at a solution surface

Ken-ichi Yuyama; Teruki Sugiyama; Hiroshi Masuhara

doi:10.1117/12.2023020

12 September 2013 Laser trapping dynamics of 200 nm-polystyrene particles at a solution surface

Ken-ichi Yuyama, Teruki Sugiyama, Hiroshi Masuhara

Proceedings Volume 8810, Optical Trapping and Optical Micromanipulation X; 88101V (2013) https://doi.org/10.1117/12.2023020
Event: SPIE NanoScience + Engineering, 2013, San Diego, California, United States

Abstract

We present laser trapping behaviors of 200 nm-polystyrene particles in D₂O solution and at its surface using a focused continuous-wave laser beam of 1064 nm. Upon focusing the laser beam into the solution surface, the particles are gathered at the focal spot, and their assembly is expanded to the outside and becomes much larger than the focal volume. The resultant assembly is observed colored under halogen lamp illumination, which is due to a periodic structure like a colloidal crystal. This trapping behavior is much different compared to the laser irradiation into the inside of the solution where a particle-like assembly with a size similar to that of the focal volume is prepared. These findings provide us new insights to consider how radiation pressure of a focused laser beam acts on nanoparticles at a solution surface.

Citation Download Citation

Ken-ichi Yuyama, Teruki Sugiyama, and Hiroshi Masuhara "Laser trapping dynamics of 200 nm-polystyrene particles at a solution surface", Proc. SPIE 8810, Optical Trapping and Optical Micromanipulation X, 88101V (12 September 2013); https://doi.org/10.1117/12.2023020

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