Journal
OPTICS LETTERS
Volume 34, Issue 3, Pages 307-309Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.34.000307
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Funding
- National Science Foundation (NSF) [HRD-0734635, HRD-0630372, ESI-0426328/002, EEC-0532472]
- U.S. Army Research Office (ARO) [W911NF-07-1-0608]
- Korea Institute of Industrial Technology(KITECH) [10027883] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [과06B1509, 2008-2002795] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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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. (C) 2009 Optical Society of America
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