Measurement of the complex dielectric constant of a single gold nanoparticle

Abstract

A differential interference contrast microscopy technique, which employs a photonic crystal fiber as a white-light source, is used to measure both the real and imaginary parts of the complex dielectric constant of single 10 and 15 nm gold nanoparticles over a wavelength range of 480 to 610 nm. Noticeable deviations from bulk gold measurements are observed at short wavelengths and for individual particles even after taking into account finite-size surface damping effects.

arXiv comment3 pages, 3 figures, resubmission after minor text changes

References in corpus (1)

• Observation of intrinsic size effects in the optical response of individual gold nanoparticles

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