Visualization of Localized Intense Optical Fields in Single Gold−Nanoparticle Assemblies and Ultrasensitive Raman Active Sites
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- 19 September 2006
- journal article
- Published by American Chemical Society (ACS) in Nano Letters
- Vol. 6 (10) , 2173-2176
- https://doi.org/10.1021/nl061650p
Abstract
We demonstrate visualization of localized intense electromagnetic fields in real space in well-tailored dimeric and trimeric gold nanospheres by using near-field optical techniques. With two-photon induced luminescence and Raman measurements, we show that the electric field is confined at an interstitial site in the aggregate. We also demonstrate optical switching operations for the electric-field localized sites in the trimer structure.Keywords
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