Nano Archive

Visualization of localized intense optical fields in single gold-nanoparticle assemblies and ultrasensitive Raman active sites

Imura, Kohei and Okamoto, Hiromi and Hossain, Mohammad K. and Kitajima, Masahiro (2006) Visualization of localized intense optical fields in single gold-nanoparticle assemblies and ultrasensitive Raman active sites. NANO LETTERS, 6 (10). pp. 2173-2176. ISSN 1530-6984

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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.

Item Type:Article
Uncontrolled Keywords:Colloidal suspension ; Aggregate ; SERS ; Electromagnetic fields ; Transition elements ; Trimer ; Switching ; Interstitials ; Experimental study ; Electric field effects ; Luminescence ; Nanosphere ; Topography ; Nanostructured materials ; Nanoparticles ; Gold ;
Subjects:Analytical Science > Microscopy and probe methods
Physical Science > Photonics
ID Code:2772
Deposited By:Lesley Tobin
Deposited On:08 Jan 2009 16:51
Last Modified:08 Jan 2009 16:51

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