| Issue |
Europhys. Lett.
Volume 53, Number 3, February 2001
|
|
|---|---|---|
| Page(s) | 364 - 370 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
| DOI | https://doi.org/10.1209/epl/i2001-00162-1 | |
| Published online | 01 December 2003 | |
Plasmon-enhanced absorption by optical phonons in metal-dielectric composites
1
Université P. et M. Curie - Paris Cedex 05, France
2
Department of Physics, New Mexico State University - Las Cruces, NM
88003, USA
3
LMOV, CNRS UMR 8634, Université de Versailles Saint-Quentin
78035 Versailles, France
4
Department of Physics, Hong Kong University of Science and
Technology Clear Water Bay, Hong Kong, PRC
Received:
7
August
2000
Accepted:
20
November
2000
It is shown that in cermets, with metal percolating clusters in a dielectric
host, the metal plasmon modes can strongly couple to the dielectric
vibrational modes, optical phonons. In metal-dielectric percolation
composites, the plasmon modes are capable of strong accumulation of the
electromagnetic energy in small nanometer-sized areas, "hot spots". The
local fields in the hot spots can be very large, leading to enhanced
absorption by optical phonons of the dielectric. In our experiments,
strongly enhanced absorption by the coupled plasmon-phonon modes has been
observed in 
percolation composites.
PACS: 72.15.Gd – Galvanomagnetic and other magnetotransport effects / 05.70.Jk – Critical point phenomena
© EDP Sciences, 2001
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