Abstract
Resonant scattering and local field enhancements by 11-nm-thin gold nanostrip antennas due to constructive interference of counter propagating slow surface plasmon polaritons is investigated. We characterize nanostrips of widths between 50-530 nm using both reflection spectroscopy and nonlinear scanning optical microscopy, in which two-photon-excited photoluminescence (TPL) excited with a strongly focused laser beam at the wavelength 745 nm is detected. We use TPL images to map the local field enhancements from individual nanostrips at a resolution of 0.35µm and compare results with theoretical calculated reflection spectra, enhancement levels and field distributions across the strip.
© 2008 Optical Society of America
© 2008 Optical Society of America
Original language | English |
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Journal | Optics Express |
Volume | 16 |
Issue number | 22 |
Pages (from-to) | 17302-17309 |
ISSN | 1094-4087 |
DOIs | |
Publication status | Published - 2008 |