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Journal Article
Research Support, U.S. Gov't, Non-P.H.S.
Optical nonlinearities of Au nanoparticles and Au/Ag coreshells.
Optics Letters 2009 Februrary 2
Au nanoparticles exhibited both negative and positive nonlinear absorptions with ground-state plasmon bleaching and free-carrier absorption that could be origins of the saturable and reverse-saturable optical properties. Au/Ag coreshells displayed only positive nonlinear absorption and reverse-saturable optical properties as a function of excitation intensity at the edge of surface-plasmon resonance, which implies no ground-state plasmon bleaching and the existence of two-photon absorption.
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