[OPTICAL REVIEW Vol. 13, No. 4 (2006) 231-234]
© 2006 The Optical Society of Japan

Surface Plasmon Resonance of Au Nanoparticles Fabricated by Negative Ion Implantation and Grid Structure toward Plasmonic Applications

Yoshihiko TAKEDA1,*, Oleg A. PLAKSIN1,2, Haisong WANG1, Kenichiro KONO1, Naoki UMEDA1 and Naoki KISHIMOTO1

1Nanomaterials Laboratory, National Institute for Materials Science, 3-13 Sakura, Tsukuba, Ibaraki 305-0003, Japan
2SSC RF-A. I. Leypunsky Institute of Physics and Power Engineering, Obninsk, Kaluga Region, 249033, Russia

(Received November 15, 2005; Accepted April 14, 2006)

Optical properties of Au nanoparticle composites and a grid structure of Cu nanoparticle composite were studied. Negative ion implantation was applied to synthesize Au and Cu nanoparticles in amorphous SiO2 and Al2O3. Au nanoparticles were embedded within a depth of 30 nm by 60 keV Au- implantation. The surface plasmon resonance (SPR) of Au:SiO2 and Au:Al2O3 composites shifted to red and to blue, respectively, compared to calculated ones by the Mie theory. Optical nonlinearity was measured with pump–probe femtosecond spectroscopy and the transient spectrum of Au:Al2O3 composite presented a large red shift from the SPR peak. Image mapping of far-field transmitted intensity of Cu-implanted SiO2 with a fine grid structure drawn by laser-lithography was observed by a scanning near-field optical microscopy (SNOM) system.

Key words: metal nanoparticle, ion implantation, surface plasmon resonance, optical nonlinearity

*E-mail address: TAKEDA.Yoshihiko@nims.go.jp