Visualization of Localized Intense Optical Fields in Single Gold−Nanoparticle Assemblies and Ultrasensitive Raman Active Sites

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 interst...

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Bibliographic Details
Published in:	Nano letters Vol. 6; no. 10; pp. 2173 - 2176
Main Authors:	Imura, Kohei, Okamoto, Hiromi, Hossain, Mohammad K, Kitajima, Masahiro
Format:	Journal Article
Language:	English
Published:	Washington, DC American Chemical Society 01-10-2006
Subjects:	Cross-disciplinary physics: materials science; rheology Electromagnetic Fields Exact sciences and technology Gold - chemistry Image Enhancement - methods Light Materials science Nanopowders Nanoscale materials and structures: fabrication and characterization Nanostructures - chemistry Nanostructures - ultrastructure Nanotechnology - methods Particle Size Physics Sensitivity and Specificity Spectrum Analysis, Raman - methods Gold Trimer Interstitials Luminescence Electromagnetic fields Experimental study Switching Nanoparticles SERS Colloidal suspension Electric field effects Transition elements Topography Nanosphere Aggregate Nanostructured materials
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