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Optical response of a single noble metal nanoparticle

Otto Muskens, Dimitris Christofilos1, Natalia Del Fatti and Fabrice Vallée

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The characterization of a single metal nanoobject by comparing its theoretical and experimental far-field spectra measured by a spatial modulation spectroscopy (SMS) technique is discussed in the case of gold and silver nanoparticles. Quantitative determination of the polarization dependent absorption cross-section spectrum of a single nanoparticle is shown to permit its optical identification, i.e., determination of its shape, size and orientation on a surface.


PACS

78.40.Kc Metals, semimetals, and alloys

81.07.Wx Nanopowders

61.46.Df Structure of nanocrystals and nanoparticles ("colloidal" quantum dots but not gate-isolated embedded quantum dots)

78.20.Ci Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity)

07.60.Rd Visible and ultraviolet spectrometers

Subjects

Condensed matter: electrical, magnetic and optical

Instrumentation and measurement

Nanoscale science and low-D systems

Dates

Issue 4 (April 2006)

Received 30 September 2005, accepted for publication 24 January 2006

Published 27 March 2006



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