14 September 2006 Extraordinary localization of collective electronic states in random media
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Proceedings Volume 6320, Complex Photonic Media; 63200X (2006); doi: 10.1117/12.679870
Event: SPIE Optics + Photonics, 2006, San Diego, California, United States
Abstract
The surface plasmons (SPs) eigenproblem which arises in inhomogeneous metal-dielectric films is studied at resonance conditions. We show that short-range correlations present in the governing Kirchhoff Hamiltonian (KH) result in delocalization of the eigenstates at the center of the spectrum. The delocalization is manifested as a power law/logarithmic singularity for the density of states and SPs localization lengths. Based on the SPs eigenproblem, analytical relationships are derived for the electromagnetic response of the semicontinuous film in resonance and off-resonance regimes. Experimental studies indirectly confirm the existence of delocalized SP states in the random system.
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Dentcho A. Genov, Xiang Zhang, Katyayani Seal, Heeso Noh, Hui Cao, Z. Charles Ying, Andrey K. Sarychev, Vladimir M. Shalaev, "Extraordinary localization of collective electronic states in random media", Proc. SPIE 6320, Complex Photonic Media, 63200X (14 September 2006); doi: 10.1117/12.679870; http://dx.doi.org/10.1117/12.679870
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KEYWORDS
Metals

Surface plasmons

Chemical elements

Dielectrics

Particles

Transition metals

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