We have investigated optical properties of single gold nanorods by using an apertured-type scanning near-field optical microscope. Near-field transmission spectrum of single gold nanorod shows several longitudinal surface plasmon resonances. Transmission images observed at these resonance wavelengths show oscillating pattern along the long axis of the nanorod. The number of oscillation increases with decrement of observing wavelength. These spatial characteristics were well reproduced by calculated local density-of-states maps and were attributed to spatial characteristics of plasmon modes inside the nanorods. Dispersion relation for plasmons in gold nanorods was obtained by plotting the resonance frequencies of the plasmon modes versus the wave vectors obtained from the transmission images. (c) 2005 American Institute of Physics.
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Univ Paris Diderot, Sorbonne Paris Cite, ITODYS, UMR CNRS 7086, 15 Rue J-A de Baif, F-75013 Paris, FranceUniv Paris Diderot, Sorbonne Paris Cite, ITODYS, UMR CNRS 7086, 15 Rue J-A de Baif, F-75013 Paris, France
Ragheb, Iman
Braik, Macilia
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Univ Mouloud Mammeri, Lab Phys & Chim Quant, Tizi Ouzou, AlgeriaUniv Paris Diderot, Sorbonne Paris Cite, ITODYS, UMR CNRS 7086, 15 Rue J-A de Baif, F-75013 Paris, France
Braik, Macilia
Mezeghrane, Abdelaziz
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Univ Mouloud Mammeri, Lab Phys & Chim Quant, Tizi Ouzou, AlgeriaUniv Paris Diderot, Sorbonne Paris Cite, ITODYS, UMR CNRS 7086, 15 Rue J-A de Baif, F-75013 Paris, France
Mezeghrane, Abdelaziz
Boubekeur-Lecaque, Leila
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Univ Paris Diderot, Sorbonne Paris Cite, ITODYS, UMR CNRS 7086, 15 Rue J-A de Baif, F-75013 Paris, FranceUniv Paris Diderot, Sorbonne Paris Cite, ITODYS, UMR CNRS 7086, 15 Rue J-A de Baif, F-75013 Paris, France
Boubekeur-Lecaque, Leila
Belkhir, Abderrahmane
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Univ Mouloud Mammeri, Lab Phys & Chim Quant, Tizi Ouzou, AlgeriaUniv Paris Diderot, Sorbonne Paris Cite, ITODYS, UMR CNRS 7086, 15 Rue J-A de Baif, F-75013 Paris, France
Belkhir, Abderrahmane
Felidj, Nordin
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Univ Paris Diderot, Sorbonne Paris Cite, ITODYS, UMR CNRS 7086, 15 Rue J-A de Baif, F-75013 Paris, FranceUniv Paris Diderot, Sorbonne Paris Cite, ITODYS, UMR CNRS 7086, 15 Rue J-A de Baif, F-75013 Paris, France
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Univ Washington, Dept Phys, Seattle, WA 98195 USA
Univ Washington, Dept Chem, Seattle, WA 98195 USAUniv Washington, Dept Phys, Seattle, WA 98195 USA
Jones, Andrew C.
Olmon, Robert L.
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Univ Washington, Dept Chem, Seattle, WA 98195 USA
Univ Washington, Dept Elect Engn, Seattle, WA 98195 USAUniv Washington, Dept Phys, Seattle, WA 98195 USA
Olmon, Robert L.
Skrabalak, Sara E.
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Indiana Univ, Dept Chem, Bloomington, IN 47405 USAUniv Washington, Dept Phys, Seattle, WA 98195 USA
Skrabalak, Sara E.
Wiley, Benjamin J.
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Harvard Univ, Dept Chem, Cambridge, MA 02138 USAUniv Washington, Dept Phys, Seattle, WA 98195 USA
Wiley, Benjamin J.
Xia, Younan N.
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Washington Univ, Dept Biomed Engn, St Louis, MO 63130 USAUniv Washington, Dept Phys, Seattle, WA 98195 USA
Xia, Younan N.
Raschke, Markus B.
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Univ Washington, Dept Phys, Seattle, WA 98195 USA
Univ Washington, Dept Chem, Seattle, WA 98195 USAUniv Washington, Dept Phys, Seattle, WA 98195 USA