Laser-induced self-assembly of silver nanoparticles via plasmonic interactions.
We report laser induced self-assembly of silver nanoparticles via plasmonic interactions. By focusing a near-infrared laser in silver nanoparticle suspension, nanoparticle assembly is formed as a result of optical trapping. The shape of Rayleigh scattering spectra of the nanoassembly strongly depends on the polarization of the laser beam. Particularly, a linearly polarized laser induces the formation of arrayed structure along the laser polarization, that shows a sharp plasmon resonance band and harnesses excellent plasmonic properties applicable for nonlinear surface enhanced spectroscopy.
Tanaka
Yoshito
Y
Department of Applied Physics, Osaka University, Suita, Osaka 565-0871, Japan.
Yoshikawa
Hiroyuki
H
Itoh
Tamitake
T
Ishikawa
Mitsuru
M