A plasmonic Fano switch

Wei Shun Chang; J. Britt Lassiter; Pattanawit Swanglap; Heidar Sobhani; Saumyakanti Khatua; Peter Nordlander; Naomi J. Halas; Stephan Link

doi:10.1021/nl302610v

A plasmonic Fano switch

Wei Shun Chang, J. Britt Lassiter, Pattanawit Swanglap, Heidar Sobhani, Saumyakanti Khatua, Peter Nordlander, Naomi J. Halas, Stephan Link

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

Abstract

Plasmonic clusters can support Fano resonances, where the line shape characteristics are controlled by cluster geometry. Here we show that clusters with a hemicircular central disk surrounded by a circular ring of closely spaced, coupled nanodisks yield Fano-like and non-Fano-like spectra for orthogonal incident polarization orientations. When this structure is incorporated into an uniquely broadband, liquid crystal device geometry, the entire Fano resonance spectrum can be switched on and off in a voltage-dependent manner. A reversible transition between the Fano-like and non-Fano-like spectra is induced by relatively low (∼6 V) applied voltages, resulting in a complete on/off switching of the transparency window.

Original language	English (US)
Pages (from-to)	4977-4982
Number of pages	6
Journal	Nano letters
Volume	12
Issue number	9
DOIs	https://doi.org/10.1021/nl302610v
State	Published - Sep 12 2012
Externally published	Yes

Keywords

active plasmonics
Fano resonance
liquid crystals
single particle spectroscopy
Surface plasmon resonance

ASJC Scopus subject areas

Bioengineering
General Chemistry
General Materials Science
Condensed Matter Physics
Mechanical Engineering

Online availability

10.1021/nl302610v

Library availability

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Cite this

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title = "A plasmonic Fano switch",

abstract = "Plasmonic clusters can support Fano resonances, where the line shape characteristics are controlled by cluster geometry. Here we show that clusters with a hemicircular central disk surrounded by a circular ring of closely spaced, coupled nanodisks yield Fano-like and non-Fano-like spectra for orthogonal incident polarization orientations. When this structure is incorporated into an uniquely broadband, liquid crystal device geometry, the entire Fano resonance spectrum can be switched on and off in a voltage-dependent manner. A reversible transition between the Fano-like and non-Fano-like spectra is induced by relatively low (∼6 V) applied voltages, resulting in a complete on/off switching of the transparency window.",

keywords = "active plasmonics, Fano resonance, liquid crystals, single particle spectroscopy, Surface plasmon resonance",

author = "Chang, {Wei Shun} and Lassiter, {J. Britt} and Pattanawit Swanglap and Heidar Sobhani and Saumyakanti Khatua and Peter Nordlander and Halas, {Naomi J.} and Stephan Link",

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doi = "10.1021/nl302610v",

language = "English (US)",

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journal = "Nano letters",

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T1 - A plasmonic Fano switch

AU - Chang, Wei Shun

AU - Lassiter, J. Britt

AU - Swanglap, Pattanawit

AU - Sobhani, Heidar

AU - Khatua, Saumyakanti

AU - Nordlander, Peter

AU - Halas, Naomi J.

AU - Link, Stephan

PY - 2012/9/12

Y1 - 2012/9/12

N2 - Plasmonic clusters can support Fano resonances, where the line shape characteristics are controlled by cluster geometry. Here we show that clusters with a hemicircular central disk surrounded by a circular ring of closely spaced, coupled nanodisks yield Fano-like and non-Fano-like spectra for orthogonal incident polarization orientations. When this structure is incorporated into an uniquely broadband, liquid crystal device geometry, the entire Fano resonance spectrum can be switched on and off in a voltage-dependent manner. A reversible transition between the Fano-like and non-Fano-like spectra is induced by relatively low (∼6 V) applied voltages, resulting in a complete on/off switching of the transparency window.

AB - Plasmonic clusters can support Fano resonances, where the line shape characteristics are controlled by cluster geometry. Here we show that clusters with a hemicircular central disk surrounded by a circular ring of closely spaced, coupled nanodisks yield Fano-like and non-Fano-like spectra for orthogonal incident polarization orientations. When this structure is incorporated into an uniquely broadband, liquid crystal device geometry, the entire Fano resonance spectrum can be switched on and off in a voltage-dependent manner. A reversible transition between the Fano-like and non-Fano-like spectra is induced by relatively low (∼6 V) applied voltages, resulting in a complete on/off switching of the transparency window.

KW - active plasmonics

KW - Fano resonance

KW - liquid crystals

KW - single particle spectroscopy

KW - Surface plasmon resonance

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A plasmonic Fano switch

Abstract

Keywords

ASJC Scopus subject areas

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