Investigations of scattering and field enhancement effects in retardation-based plasmonic nanoantennas

M. G. Nielsen; A. Pors; Rasmus Bundgaard Nielsen; Alexandra Boltasseva; O. Albrektsen; Morten Willatzen; S. I. Bozhevolnyi

doi:10.1117/12.868363

Investigations of scattering and field enhancement effects in retardation-based plasmonic nanoantennas

M. G. Nielsen, A. Pors, Rasmus Bundgaard Nielsen, Alexandra Boltasseva, O. Albrektsen, Morten Willatzen, S. I. Bozhevolnyi

University of Southern Denmark

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

Abstract

Modifications in scattering strength of and local field enhancement by retardation-based plasmonic nanoantennas when being transformed from straight nanorods to split-rings are investigated. The scattering properties are monitored by linear reflection and extinction spectroscopy whereas local field enhancement is estimated from measurements on individual nanoantennas by nonlinear scanning optical microscopy in which two-photon-excited photoluminescence (TPL) is detected. The linear and nonlinear optical characterizations reveal, that the optical response of nanoantennas is dominated by constructively interfering short-range surface plasmon polaritons (SR-SPP) and that the transformation of straight nanorods into split-rings by bending significantly influences the scattering strength. Importantly, strong suppression of scattering for the fundamental SR-SPP mode is observed when the bend radius is decreased, a feature that we attribute to the decrease in the nanoantenna electric-dipole response in tact with its bending. The experimental observations are corroborated with numerical simulations using the finite-element method.

Original language	English
Title of host publication	Plasmonics: Metallic Nanostructures and Their Optical Properties VIII
Number of pages	11
Publication date	2010
Pages	77573O
ISBN (Print)	978-0-81948-253-2
DOIs	https://doi.org/10.1117/12.868363
Publication status	Published - 2010
Event	Conference on Plasmonics: Metallic Nanostructures and Their Optical Properties VIII - San Diego, CA, United States Duration: 1 Aug 2010 → 5 Aug 2010 Conference number: 8

Conference

Conference	Conference on Plasmonics: Metallic Nanostructures and Their Optical Properties VIII
Number	8
Country/Territory	United States
City	San Diego, CA
Period	01/08/2010 → 05/08/2010

Series	Proceedings of SPIE - The International Society for Optical Engineering
ISSN	0277-786X

Keywords

Surface plasmons
Metal optics
Resonators
Scattering
Nonlinear optics
Nanostructure fabrication

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title = "Investigations of scattering and field enhancement effects in retardation-based plasmonic nanoantennas",

abstract = "Modifications in scattering strength of and local field enhancement by retardation-based plasmonic nanoantennas when being transformed from straight nanorods to split-rings are investigated. The scattering properties are monitored by linear reflection and extinction spectroscopy whereas local field enhancement is estimated from measurements on individual nanoantennas by nonlinear scanning optical microscopy in which two-photon-excited photoluminescence (TPL) is detected. The linear and nonlinear optical characterizations reveal, that the optical response of nanoantennas is dominated by constructively interfering short-range surface plasmon polaritons (SR-SPP) and that the transformation of straight nanorods into split-rings by bending significantly influences the scattering strength. Importantly, strong suppression of scattering for the fundamental SR-SPP mode is observed when the bend radius is decreased, a feature that we attribute to the decrease in the nanoantenna electric-dipole response in tact with its bending. The experimental observations are corroborated with numerical simulations using the finite-element method.",

keywords = "Surface plasmons, Metal optics, Resonators, Scattering, Nonlinear optics, Nanostructure fabrication ",

author = "Nielsen, {M. G.} and A. Pors and Nielsen, {Rasmus Bundgaard} and Alexandra Boltasseva and O. Albrektsen and Morten Willatzen and Bozhevolnyi, {S. I.}",

year = "2010",

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isbn = "978-0-81948-253-2",

series = "Proceedings of SPIE - The International Society for Optical Engineering",

publisher = "Society of Photo-Optical Instrumentation Engineers",

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note = "Conference on Plasmonics: Metallic Nanostructures and Their Optical Properties VIII ; Conference date: 01-08-2010 Through 05-08-2010",

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Nielsen, MG, Pors, A, Nielsen, RB, Boltasseva, A, Albrektsen, O, Willatzen, M & Bozhevolnyi, SI 2010, Investigations of scattering and field enhancement effects in retardation-based plasmonic nanoantennas. in Plasmonics: Metallic Nanostructures and Their Optical Properties VIII. Proceedings of SPIE - The International Society for Optical Engineering, pp. 77573O, Conference on Plasmonics: Metallic Nanostructures and Their Optical Properties VIII, San Diego, CA, United States, 01/08/2010. https://doi.org/10.1117/12.868363

Investigations of scattering and field enhancement effects in retardation-based plasmonic nanoantennas. / Nielsen, M. G.; Pors, A.; Nielsen, Rasmus Bundgaard et al.
Plasmonics: Metallic Nanostructures and Their Optical Properties VIII. 2010. p. 77573O (Proceedings of SPIE - The International Society for Optical Engineering).

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

TY - GEN

T1 - Investigations of scattering and field enhancement effects in retardation-based plasmonic nanoantennas

AU - Nielsen, M. G.

AU - Pors, A.

AU - Nielsen, Rasmus Bundgaard

AU - Boltasseva, Alexandra

AU - Albrektsen, O.

AU - Willatzen, Morten

AU - Bozhevolnyi, S. I.

N1 - Conference code: 8

PY - 2010

Y1 - 2010

N2 - Modifications in scattering strength of and local field enhancement by retardation-based plasmonic nanoantennas when being transformed from straight nanorods to split-rings are investigated. The scattering properties are monitored by linear reflection and extinction spectroscopy whereas local field enhancement is estimated from measurements on individual nanoantennas by nonlinear scanning optical microscopy in which two-photon-excited photoluminescence (TPL) is detected. The linear and nonlinear optical characterizations reveal, that the optical response of nanoantennas is dominated by constructively interfering short-range surface plasmon polaritons (SR-SPP) and that the transformation of straight nanorods into split-rings by bending significantly influences the scattering strength. Importantly, strong suppression of scattering for the fundamental SR-SPP mode is observed when the bend radius is decreased, a feature that we attribute to the decrease in the nanoantenna electric-dipole response in tact with its bending. The experimental observations are corroborated with numerical simulations using the finite-element method.

AB - Modifications in scattering strength of and local field enhancement by retardation-based plasmonic nanoantennas when being transformed from straight nanorods to split-rings are investigated. The scattering properties are monitored by linear reflection and extinction spectroscopy whereas local field enhancement is estimated from measurements on individual nanoantennas by nonlinear scanning optical microscopy in which two-photon-excited photoluminescence (TPL) is detected. The linear and nonlinear optical characterizations reveal, that the optical response of nanoantennas is dominated by constructively interfering short-range surface plasmon polaritons (SR-SPP) and that the transformation of straight nanorods into split-rings by bending significantly influences the scattering strength. Importantly, strong suppression of scattering for the fundamental SR-SPP mode is observed when the bend radius is decreased, a feature that we attribute to the decrease in the nanoantenna electric-dipole response in tact with its bending. The experimental observations are corroborated with numerical simulations using the finite-element method.

KW - Surface plasmons

KW - Metal optics

KW - Resonators

KW - Scattering

KW - Nonlinear optics

KW - Nanostructure fabrication

U2 - 10.1117/12.868363

DO - 10.1117/12.868363

M3 - Article in proceedings

SN - 978-0-81948-253-2

T3 - Proceedings of SPIE - The International Society for Optical Engineering

SP - 77573O

BT - Plasmonics: Metallic Nanostructures and Their Optical Properties VIII

T2 - Conference on Plasmonics: Metallic Nanostructures and Their Optical Properties VIII

Y2 - 1 August 2010 through 5 August 2010

ER -

Nielsen MG, Pors A, Nielsen RB, Boltasseva A, Albrektsen O, Willatzen M et al. Investigations of scattering and field enhancement effects in retardation-based plasmonic nanoantennas. In Plasmonics: Metallic Nanostructures and Their Optical Properties VIII. 2010. p. 77573O. (Proceedings of SPIE - The International Society for Optical Engineering). doi: 10.1117/12.868363

Investigations of scattering and field enhancement effects in retardation-based plasmonic nanoantennas

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