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Measurement of the complex dielectric constant of a single gold nanoparticle

Patrick Stoller·Volker Jacobsen·Vahid Sandoghdar
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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.

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Patrick Stoller, Volker Jacobsen, Vahid Sandoghdar. 2006-05-23. Measurement of the complex dielectric constant of a single gold nanoparticle. https://doi.org/10.1364/ol.31.002474

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