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Phys. Rev. B 64, 125106 (2001) [5 pages]

Experimental observation of percolation-enhanced nonlinear light scattering from semicontinuous metal films

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M. Breit1, V. A. Podolskiy3, S. Grésillon1,2, G. von Plessen1, J. Feldmann1, J. C. Rivoal2, P. Gadenne5, Andrey K. Sarychev3, and Vladimir M. Shalaev1,3,4
1Photonics and Optoelectronics Group, Physics Department and CeNS, University of Munich, D-80799 München, Germany
2Lab. Optique Physique, ESPCI, CNRS-UPR5 and Université P. et M. Curie, 75231 Paris, France
3Department of Physics, New Mexico State University, Las Cruces, New Mexico 88003
4School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907-1285
5L.M.O.V., Université de Versailles Saint Quentin, CNRS UMR 8634, F-78035 Versailles, France

Received 15 May 2001; published 6 September 2001

Strongly enhanced second-harmonic generation (SHG), which is characterized by a nearly isotropic intensity distribution, is observed for gold-glass films near the percolation threshold. The diffuselike SHG scattering, which can be thought of as nonlinear critical opalescence, is in sharp contrast with highly collimated linear reflection and transmission from these nanostructured semicontinuous metal films. Our observations, which can be explained by giant fluctuations of local nonlinear sources for SHG due to plasmon localization, verify recent predictions of percolation-enhanced nonlinear scattering.

© 2001 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.64.125106
DOI:
10.1103/PhysRevB.64.125106
PACS:
72.15.Gd, 05.70.Jk, 42.65.Ky, 78.20.Ci
 
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