Intensity-Dependent Optical Absorption of Colloidal Solutions of Gold Nanoparticles

Autor:	Werner J. Blau, Fryad Z. Henari, K. Puech, D. Duff, G. Schmid
Rok vydání:	1995
Předmět:	Photon Materials science Fermi level Physics::Optics General Physics and Astronomy Electron Two-photon absorption Molecular physics symbols.namesake Colloid Nuclear magnetic resonance Colloidal gold symbols Surface plasmon resonance Absorption (electromagnetic radiation)
Zdroj:	Europhysics Letters (EPL). 32:119-124
ISSN:	1286-4854 0295-5075
Popis:	Intensity-dependent absorption measurements for determining the non-linear optical susceptibility of aqueous colloidal solutions of gold nanoparticles are presented. The diameters of the gold particles ranged from 50 to 400 A. Measurements were performed in the vicinity of the surface plasmon resonance frequency and the resonantly enhanced susceptibility was found to be of the order of 5 · 10-16m2V-2. This is attributed to a change in the Fermi-Dirac distribution of electrons about the Fermi level and is caused by an increase in their temperature due to absorption of resonant photons. The intensity dependence of the absorption showed that the system can be described as inhomogeneously broadened.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::41e9802f4acaf6019052911526056598 https://doi.org/10.1209/0295-5075/32/2/005 Zobrazit plný text záznamu