Title :
Near-field images of surface plasmon eigenmodes in gold nanogratings
Author :
Ho, Fu Han ; Chen, Sheng Yuan ; Lin, Yu Hsuan ; Su, Jien Yin
Author_Institution :
Instrum. Technol. Res. Center (ITRC), Hsinchu
fDate :
Aug. 12 2007-July 16 2007
Abstract :
In this study, we have fabricated gold nanograting structures by using a focused-ion-beam system. The nano-optical properties were examined by using both the scattering- and transmission-mode near-field scanning optical microscope (NSOM). The surface plasmon (SP) eigenmode in this periodic nanostructure is directly observed by the scattering-mode NSOM. Two SP waves, localized fields and propagating waves, generating in the near field were found by the transmission-mode NSOM, and the dependence of wavelengths was studied. The relations of scattering- and transmission-mode results were discussed as well.
Keywords :
diffraction gratings; eigenvalues and eigenfunctions; focused ion beam technology; gold; light scattering; metallic thin films; micro-optics; nanostructured materials; nanotechnology; near-field scanning optical microscopy; optical fabrication; surface plasmons; Au - Surface; focused-ion-beam system; gold film; gold nanogratings; nanooptical properties; near-field images; periodic nanostructure; scattering-mode near-field scanning optical microscope; surface plasmon eigenmodes; surface plasmon waves; transmission-mode near-field scanning optical microscope; Biomedical optical imaging; Gold; Optical films; Optical microscopy; Optical propagation; Optical scattering; Optical sensors; Optical surface waves; Plasmons; Resonance light scattering; Plasmonics; focused-ion-beam system; nano-optics; near-field scanning optical microscope;
Conference_Titel :
Optical MEMS and Nanophotonics, 2007 IEEE/LEOS International Conference on
Conference_Location :
Hualien
Print_ISBN :
978-1-4244-0641-8
DOI :
10.1109/OMEMS.2007.4373871
