期刊
OPTICS EXPRESS
卷 18, 期 1, 页码 165-172出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.18.000165
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资金
- National Science Council of Taiwan [NSC95-2112-M-006-030]
- Landmark Project of National Cheng Kung University, Taiwan
In this paper we investigate the near-field optical behavior of plasmon coupling in gold nanoparticle pairs. In particular, by performing series measurements through a fiber-collection mode near-field scanning optical microscope (NSOM), we directly observed the localized electromagnetic (EM) field distribution between two nanospheres is sensitively depended on the incident polarization and interparticle distance. The qualitative near-field observation and quantitative analysis facilitate more understanding of localized hot spots in surface-enhanced Raman scattering (SERS), and nano-applications in selectively controlling the spatial distribution of localized surface plasmon (SP) modes on a fabricated nanostructure by adjusting the polarization direction. (C) 2009 Optical Society of America
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