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Optimization of plasmon–plasmon coupling in photorefractive layered media

Optimization of plasmon–plasmon coupling in photorefractive layered media
Optimization of plasmon–plasmon coupling in photorefractive layered media
In this paper we study grating-induced plasmon–plasmon coupling in photorefractive layered media using a weakcoupling approximation. The method used is applicable to general layered structures that support both plasmonic and optical modes, such as photorefractive liquid crystal cells. The approximate equations are accurate when compared to S matrix approaches and capture the plasmon propagation at the surface of the device along with the optical modes guided by the layered geometry underneath. Analysis of the resulting model provides insight into the effect of the control parameters in this device and the means to optimize the diffraction efficiency. For example, by considering the case in which the plasmon is spectrally separated from the guided modes it is possible to determine the optimum gold thickness and grating strength required to obtain the strongest possible diffraction.
0740-3224
2090-2099
Daly, K.R.
e28b1acf-cdde-4b52-8d83-cf314d7c3466
Abbott, S.B.
d60c18a0-2f63-4708-998f-212ab38bea50
Smith, D.C.
d9b2c02d-b7ea-498b-9ea1-208a1681536f
D'Alessandro, G.D.
bad097e1-9506-4b6e-aa56-3e67a526e83b
Daly, K.R.
e28b1acf-cdde-4b52-8d83-cf314d7c3466
Abbott, S.B.
d60c18a0-2f63-4708-998f-212ab38bea50
Smith, D.C.
d9b2c02d-b7ea-498b-9ea1-208a1681536f
D'Alessandro, G.D.
bad097e1-9506-4b6e-aa56-3e67a526e83b

Daly, K.R., Abbott, S.B., Smith, D.C. and D'Alessandro, G.D. (2013) Optimization of plasmon–plasmon coupling in photorefractive layered media. Journal of the Optical Society of America B, 30 (8), 2090-2099. (doi:10.1364/JOSAB.30.002090).

Record type: Article

Abstract

In this paper we study grating-induced plasmon–plasmon coupling in photorefractive layered media using a weakcoupling approximation. The method used is applicable to general layered structures that support both plasmonic and optical modes, such as photorefractive liquid crystal cells. The approximate equations are accurate when compared to S matrix approaches and capture the plasmon propagation at the surface of the device along with the optical modes guided by the layered geometry underneath. Analysis of the resulting model provides insight into the effect of the control parameters in this device and the means to optimize the diffraction efficiency. For example, by considering the case in which the plasmon is spectrally separated from the guided modes it is possible to determine the optimum gold thickness and grating strength required to obtain the strongest possible diffraction.

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e-pub ahead of print date: 5 June 2013
Published date: 12 July 2013
Organisations: Faculty of Engineering and the Environment

Identifiers

Local EPrints ID: 354424
URI: http://eprints.soton.ac.uk/id/eprint/354424
ISSN: 0740-3224
PURE UUID: 812ad7da-9420-4b80-b862-dad3798c8a16
ORCID for G.D. D'Alessandro: ORCID iD orcid.org/0000-0001-9166-9356

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Date deposited: 15 Jul 2013 10:47
Last modified: 20 Jul 2019 01:19

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Contributors

Author: K.R. Daly
Author: S.B. Abbott
Author: D.C. Smith

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