PERCOLATION AND FRACTAL COMPOSITES: OPTICAL STUDIES-Reference-Cited by-同舟云学术

PERCOLATION AND FRACTAL COMPOSITES: OPTICAL STUDIES

Published:2000-03 Issue:01 Volume:09 Page:105-116
ISSN:0218-8635
Container-title:Journal of Nonlinear Optical Physics & Materials
language:en
Short-container-title:J. Nonlinear Optic. Phys. Mat.

Author:

DUCOURTIEUX S.¹,GRÉSILLON S.¹,BOCCARA A. C.¹,RIVOAL J. C.¹,QUELIN X.¹²,GADENNE P.¹²,DRACHEV V. P.³⁴,BRAGG W. D.³,SAFONOV V. P.³⁵,PODOLSKIY V. A.³,YING Z. C.³,ARMSTRONG R. L.³,SHALAEV VLADIMIR M.³

Affiliation:

1. Université P. et M. Curie, Laboratoire d'Optique Physique, ESPCI, 75231 Paris, France

2. LMOV, CNRS UMR 8634, Université de Versailles Saint-Quentin, 78035 Versailles, France

3. Department of Physics, New Mexico State University, Las Cruces, NM 88003, USA

4. Institute of Semiconductor Physics, Novosibirsk 630090, Russia

5. Institute of Automation and Electrometry, Novosibirsk 630090, Russia

Abstract

Local field distributions are studied in random metal–dielectric films near percolation (percolation films) and fractal aggregates of colloidal particles. For both systems, it is shown that optical excitations are localized in small nanometer-scale areas, "hot spots," where the local fields are much larger than the field of an incident electromagnetic wave. The large local fields result in giant enhancement of various optical phenomena. The surface-enhanced white-light generation and second-harmonic generation have been obtained in percolation films. For fractal aggregates of silver particles, a giant effect of local optical activity has been observed. The effect is due to surface-plasmon excitations localized on chiral-active particle configurations in fractals.

Publisher

World Scientific Pub Co Pte Lt

Subject

Physics and Astronomy (miscellaneous),Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials

Link

https://www.worldscientific.com/doi/pdf/10.1142/S0218863500000108

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