Hyper-Rayleigh and hyper-Raman scattering from silver nanoparticles trapped by a near-infrared laser beam

Hiroyuki Yoshikawa; Takashi Ihama; Tamitake Ito; Yukihiro Ozaki; Hiroshi Masuhara

doi:10.1117/12.614706

26 August 2005 Hyper-Rayleigh and hyper-Raman scattering from silver nanoparticles trapped by a near-infrared laser beam

Hiroyuki Yoshikawa, Takashi Ihama, Tamitake Ito, Yukihiro Ozaki, Hiroshi Masuhara

Author Affiliations +

Proceedings Volume 5930, Optical Trapping and Optical Micromanipulation II; 59300T (2005) https://doi.org/10.1117/12.614706
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

Abstract

When near-infrared laser was focused in colloidal silver, not only optical trapping of silver nanoparticles, but also hyper-Rayleigh scattering were observed at the laser focus. By addition of NaCl and rhodamine 6G in the colloidal silver, hyper-Rayleigh scattering was enhanced and hyper-Raman scattering was also observed. These nonlinear optical responses showed temporal fluctuation in spite of the continuous laser irradiation. Experimental results suggested that aggregates which have a high activity for nonlinear optical responses were trapped and/or produced by a focusing near-infrared laser. Hyper-Raman signal, whose scattering cross section is much lower than normal Raman scattering, could be obtained easily by focusing a cw-YAG laser in colloidal silver including analytes. It was demonstrated that optical trapping of colloidal silver is a powerful technique to obtain the nonlinear optical responses.

Citation Download Citation

Hiroyuki Yoshikawa, Takashi Ihama, Tamitake Ito, Yukihiro Ozaki, and Hiroshi Masuhara "Hyper-Rayleigh and hyper-Raman scattering from silver nanoparticles trapped by a near-infrared laser beam", Proc. SPIE 5930, Optical Trapping and Optical Micromanipulation II, 59300T (26 August 2005); https://doi.org/10.1117/12.614706

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