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

Akira Eguchi; Phat Lu; Youngsik Kim; Tom D. Milster

doi:10.1117/1.JNP.11.046007

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

Akira Eguchi, Phat Lu, Youngsik Kim, Tom D. Milster

Research output: Contribution to journal › Article › peer-review

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.

Original language	English (US)
Article number	046007
Journal	Journal of Nanophotonics
Volume	11
Issue number	4
DOIs	https://doi.org/10.1117/1.JNP.11.046007
State	Published - Oct 1 2017

Keywords

Nonlinear emission
gold nanoparticle
hot electron
nanoparticle aggregation
short-wave infrared

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1117/1.JNP.11.046007

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title = "Characterization of emission from aggregated gold nanoparticles excited nonlinearly by 1560-nm femtosecond laser",

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.",

keywords = "Nonlinear emission, gold nanoparticle, hot electron, nanoparticle aggregation, short-wave infrared",

author = "Akira Eguchi and Phat Lu and Youngsik Kim and Milster, {Tom D.}",

note = "Funding Information: We thank Canon Inc. for financial support and Masakatsu Ota, Yasuyuki Unno, and Yoshiyuki Sekine of Canon Inc. for supporting this study. We are grateful to our colleagues Lee Johnson for technical support, Weichuan Gao for fruitful discussion, and Emily Finan for comments on the manuscript. We also thank Rolf Binder, Jerome V. Moloney, Colm Dineen, and John Nehls for technical discussions. The authors declare no competing financial interest. Publisher Copyright: {\textcopyright} 2017 Society of Photo-Optical Instrumentation Engineers (SPIE).",

year = "2017",

month = oct,

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doi = "10.1117/1.JNP.11.046007",

language = "English (US)",

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AU - Eguchi, Akira

AU - Lu, Phat

AU - Kim, Youngsik

AU - Milster, Tom D.

N1 - Funding Information: We thank Canon Inc. for financial support and Masakatsu Ota, Yasuyuki Unno, and Yoshiyuki Sekine of Canon Inc. for supporting this study. We are grateful to our colleagues Lee Johnson for technical support, Weichuan Gao for fruitful discussion, and Emily Finan for comments on the manuscript. We also thank Rolf Binder, Jerome V. Moloney, Colm Dineen, and John Nehls for technical discussions. The authors declare no competing financial interest. Publisher Copyright: © 2017 Society of Photo-Optical Instrumentation Engineers (SPIE).

PY - 2017/10/1

Y1 - 2017/10/1

N2 - 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.

AB - 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.

KW - Nonlinear emission

KW - gold nanoparticle

KW - hot electron

KW - nanoparticle aggregation

KW - short-wave infrared

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

Abstract

Keywords

ASJC Scopus subject areas

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