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 μm 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-μs 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)|
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Q Science > QC Physics
|Divisions:||University Structure - Pre August 2011 > Optoelectronics Research Centre
|Date Deposited:||11 Aug 2008|
|Last Modified:||02 Mar 2012 12:12|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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