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Journal of Nanophotonics

Characterization of emission from aggregated gold nanoparticles excited nonlinearly by 1560-nm femtosecond laser
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Paper Abstract

Nonlinear emission properties of aggregated 50-nm gold nanoparticles (GNPs) excited by a femtosecond laser at 1560 nm are characterized. Aggregate forms are correlated to emission by scanning electron microscope imaging and pattern matching. Broad spectra in the visible region are obtained from aggregated GNPs, and their emission power exhibits a quadratic power dependence and an exponential decay in time due to morphology change. Polarization analysis reveals that longitudinal plasmonic modes play important roles for nonlinear emission. Relationships between brightness and morphology show that a large number of aggregates produce luminescence enhancement but with associated photo damage. It is proposed that characteristics of nonlinear emission from GNPs are explained by plasmon enhanced polarized hot electrons.

Paper Details

Date Published: 31 October 2017
PDF: 12 pages
J. Nanophoton. 11(4) 046007 doi: 10.1117/1.JNP.11.046007
Published in: Journal of Nanophotonics Volume 11, Issue 4
Show Author Affiliations
Akira Eguchi, College of Optical Sciences, The Univ. of Arizona (United States)
Canon Inc. (Japan)
Phat Lu, College of Optical Sciences, The Univ. of Arizona (United States)
Youngsik Kim, College of Optical Sciences, The Univ. of Arizona (United States)
Tom D. Milster, College of Optical Sciences, The Univ. of Arizona (United States)


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