Modeling of nonlinear microscopy of localized field enhancements in random metal nanostructures

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Resumé

Udgivelsesdato: MAR
OriginalsprogEngelsk
Artikelnummer115408
TidsskriftPhysical Review B
Vol/bind73
Udgave nummer11
DOI
StatusUdgivet - 13. mar. 2006

Fingeraftryk

Nanostructures
Microscopic examination
Metals
microscopy
harmonics
augmentation
Gold
metals
Scattering
Polarization
Scanning
Laser beams
gold
Wavelength
dyadics
scanning
sensitivity
polarization
configurations
bears

Citer dette

@article{14c2a49036d411dda26c000ea68e967b,
title = "Modeling of nonlinear microscopy of localized field enhancements in random metal nanostructures",
abstract = "Nonlinear microscopy of localized field enhancements in random metal nanostructures with a tightly focused laser beam scanning over a sample surface is modeled by making use of analytic representations of the Green dyadic in the near- and far-field regions, with the latter being approximated by the part describing the scattering via excitation of surface plasmon polaritons. The developed approach is applied to scanning second-harmonic (SH) microscopy of small gold spheres placed randomly on a gold surface. We calculate self-consistent fundamental harmonic (FH) and SH field distributions at the illuminated sample surface and, thereby, FH and SH images for different polarization configurations of the illuminating and detected fields. The simulated images bear close resemblance to the images obtained experimentally, exhibiting similar sensitivity to the wavelength and polarization, as well as sensitivity to the scattering configuration. We verify directly our conjecture that very bright spots in the SH images occur due to the spatial overlap of properly polarized FH and SH eigenmodes. Applications and further improvements of the developed model are discussed.",
author = "Jonas Beermann and Bozhevolnyi, {Sergey I.} and Victor Coello",
year = "2006",
month = "3",
day = "13",
doi = "10.1103/PhysRevB.73.115408",
language = "English",
volume = "73",
journal = "Physical Review B",
issn = "1098-0121",
publisher = "American Physical Society",
number = "11",

}

Modeling of nonlinear microscopy of localized field enhancements in random metal nanostructures. / Beermann, Jonas; Bozhevolnyi, Sergey I.; Coello, Victor.

I: Physical Review B, Bind 73, Nr. 11, 115408, 13.03.2006.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Modeling of nonlinear microscopy of localized field enhancements in random metal nanostructures

AU - Beermann, Jonas

AU - Bozhevolnyi, Sergey I.

AU - Coello, Victor

PY - 2006/3/13

Y1 - 2006/3/13

N2 - Nonlinear microscopy of localized field enhancements in random metal nanostructures with a tightly focused laser beam scanning over a sample surface is modeled by making use of analytic representations of the Green dyadic in the near- and far-field regions, with the latter being approximated by the part describing the scattering via excitation of surface plasmon polaritons. The developed approach is applied to scanning second-harmonic (SH) microscopy of small gold spheres placed randomly on a gold surface. We calculate self-consistent fundamental harmonic (FH) and SH field distributions at the illuminated sample surface and, thereby, FH and SH images for different polarization configurations of the illuminating and detected fields. The simulated images bear close resemblance to the images obtained experimentally, exhibiting similar sensitivity to the wavelength and polarization, as well as sensitivity to the scattering configuration. We verify directly our conjecture that very bright spots in the SH images occur due to the spatial overlap of properly polarized FH and SH eigenmodes. Applications and further improvements of the developed model are discussed.

AB - Nonlinear microscopy of localized field enhancements in random metal nanostructures with a tightly focused laser beam scanning over a sample surface is modeled by making use of analytic representations of the Green dyadic in the near- and far-field regions, with the latter being approximated by the part describing the scattering via excitation of surface plasmon polaritons. The developed approach is applied to scanning second-harmonic (SH) microscopy of small gold spheres placed randomly on a gold surface. We calculate self-consistent fundamental harmonic (FH) and SH field distributions at the illuminated sample surface and, thereby, FH and SH images for different polarization configurations of the illuminating and detected fields. The simulated images bear close resemblance to the images obtained experimentally, exhibiting similar sensitivity to the wavelength and polarization, as well as sensitivity to the scattering configuration. We verify directly our conjecture that very bright spots in the SH images occur due to the spatial overlap of properly polarized FH and SH eigenmodes. Applications and further improvements of the developed model are discussed.

U2 - 10.1103/PhysRevB.73.115408

DO - 10.1103/PhysRevB.73.115408

M3 - Journal article

VL - 73

JO - Physical Review B

JF - Physical Review B

SN - 1098-0121

IS - 11

M1 - 115408

ER -