| LOSURDO, Maria, Maria M GIANGREGORIO, Giuseppe V BIANCO, Alexandra A SUVOROVA, C. KONG, S. RUBANOV, Pio CAPEZZUTO, Josef HUMLÍČEK and Giovanni BRUNO. Size dependence of the dielectric function of silicon-supported plasmonic gold nanoparticles. Physical Review B. USA: American Physical Society, 2010, vol. 82, No 15, p. 155451-9, 9 pp. ISSN 1098-0121. |
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@article{915970,
author = {Losurdo, Maria and Giangregorio, Maria M and Bianco, Giuseppe V and Suvorova, Alexandra A and Kong, C. and Rubanov, S. and Capezzuto, Pio and Humlíček, Josef and Bruno, Giovanni},
article_location = {USA},
article_number = {15},
keywords = {SMALL ISLAND PARTICLES; OPTICAL-PROPERTIES; METAL NANOPARTICLES; SILVER FILMS; RELAXATION DYNAMICS; ABSORPTION; RESONANCE; TRANSITIONS; TEMPERATURE; INTERFACE},
language = {eng},
issn = {1098-0121},
journal = {Physical Review B},
title = {Size dependence of the dielectric function of silicon-supported plasmonic gold nanoparticles},
volume = {82},
year = {2010}
}
TY - JOUR
ID - 915970
AU - Losurdo, Maria - Giangregorio, Maria M - Bianco, Giuseppe V - Suvorova, Alexandra A - Kong, C. - Rubanov, S. - Capezzuto, Pio - Humlíček, Josef - Bruno, Giovanni
PY - 2010
TI - Size dependence of the dielectric function of silicon-supported plasmonic gold nanoparticles
JF - Physical Review B
VL - 82
IS - 15
SP - 155451-9
EP - 155451-9
PB - American Physical Society
SN - 10980121
KW - SMALL ISLAND PARTICLES
KW - OPTICAL-PROPERTIES
KW - METAL NANOPARTICLES
KW - SILVER FILMS
KW - RELAXATION DYNAMICS
KW - ABSORPTION
KW - RESONANCE
KW - TRANSITIONS
KW - TEMPERATURE
KW - INTERFACE
N2 - Gold nanoparticles (NPs) are directly deposited on a Si(111) substrate by Ar sputtering to provide a semiconductor-based plasmonic platform. The Au NPs are characterized by interband transitions at energies above 2.5 eV, whose tails extend into the surface-plasmon resonance (SPR) region, hence affecting the SPR energy, amplitude, and broadening. Herein, we report the experimental evidence of the size dependence of the interband transitions for Au NPs supported on silicon and sapphire substrates by exploiting plasmonic ellipsometry. Providing the size dependence of the dielectric function of Au NPs in the extended spectral range of 190-1700 nm, and discussing the interconnection between the SPR and the interband transitions, this study as a whole represents a step ahead in the perspective of a better understanding of nanosize effect on optical properties and standardization of nanoparticles dielectric functions to rely on more accurate modeling of NPs behavior.
ER -
LOSURDO, Maria, Maria M GIANGREGORIO, Giuseppe V BIANCO, Alexandra A SUVOROVA, C. KONG, S. RUBANOV, Pio CAPEZZUTO, Josef HUMLÍČEK and Giovanni BRUNO. Size dependence of the dielectric function of silicon-supported plasmonic gold nanoparticles. \textit{Physical Review B}. USA: American Physical Society, 2010, vol.~82, No~15, p.~155451-9, 9 pp. ISSN~1098-0121.
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