Optical Saturable Absorption in Gold Nanoparticles

被引：0
|
作者：
Leonardo De Boni
Erin Leigh Wood
Carlos Toro
Florencio E. Hernandez
机构：
[1] University of Central Florida,Department of Chemistry
[2] University of Central Florida,CREOL—The College of Optics and Photonics
来源：
Plasmonics | 2008年 / 3卷
关键词：
Metal nanoparticles; Surface plasmon resonance; Nonlinear absorption; Saturable absorption; Plasmonics;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
In this work, we present the experimental study of the nonlinear absorption of gold nanospheres and nanorods in aqueous suspension, using picosecond white-light supercontinuum open-aperture Z-scan. We demonstrate a saturable absorption effect in all particle suspensions at low-pulse energy. In the high-pulse energy regime, the apparent reverse-saturable absorption, observed in gold nanorods, was determined to be induced by photodegradation. Using the Lorentzian deconvolution method for the absorption spectra, we explain the variations on nonlinear optical effects and prove that saturable absorption only occurs within the plasmonic bands.
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页码：171 / 176
页数：5
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