Nonlinear plasmonics in a gallium/aluminium nano-composite

MacDonald, K.F., Krasavin, A.V., Soares, B.F., Bashevoy, M.V., Jonsson, F. and Zheludev, N.I. (2006) Nonlinear plasmonics in a gallium/aluminium nano-composite. In, QEP-17 at Photon06, Manchester, UK, 04 - 07 Sep 2006.


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We report the discovery of a highly nonlinear material structure that supports surface plasmon-polariton (SPP) waves. It is generally perceived that nonlinear SPP propagation regimes are difficult to achieve because SPP's are localized between two low-nonlinearity media - a highly transparent dielectric and a metal. It is well suited to nonlinear switching contrast: the SPP decay length in liquid gallium (5-20 plasmonic applications such as the active control of SPP propagation because the excitation-induced transition in gallium is surface-driven and provides very good ?m at visible and near-IR wavelengths) is approximately ten times longer than in solid gallium. The formation of the gallium/aluminium composite has been investigated using Electron Backscatter Diffraction and its ability to control SPP waves with sub-ns response and sub-?s relaxation times demonstrated in experiments based on the Otto configuration for SPP wave excitation, and on metal/dielectric micro-gratings (prepared by photolithography) designed to couple light to/from SPP's.

Item Type: Conference or Workshop Item (Paper)
Related URLs:
Subjects: Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions : University Structure - Pre August 2011 > Optoelectronics Research Centre
ePrint ID: 57753
Accepted Date and Publication Date:
September 2006Published
Date Deposited: 11 Aug 2008
Last Modified: 14 Oct 2016 14:47

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