LINEAR ELECTRO-OPTICAL EFFECTS IN SiC NANOCRYSTALS INCORPORATED IN POLYMER
MATRICES
J. Bouclé (1, 2), A. Kassiba (1), I.V. Kityk (3), J. Bouclé (1, 2),
N.Herlin (2) and J. Sanetra (1)
(1) Laboratoire de Physique de l'État Condensé UMR-CNRS 6087, av.
O.Messiaen, 72089 Le Mans cedex 9, France ; (2) Service des Photons,
Atomes et Molécules, Laboratoire Francis Perrin (CEA-CNRS URA2453),
DSM - CEA-Saclay, Bt 522, 91191 F Gif/Yvette Cedex, (3) Physics
Institute, Pedagogical Univ., Al. Ar. Krajowej 13/15, PL-42201
Czestochowa, Poland
Semi-conducting SiC nanocrystals exhibit versatile electronic and optical
properties markdly different than those involved in bulk materials. The main
roles are played by the particle size, the crystalline polytype and defect
contents. Recently, we have undertaken the synthesis of nanocomposites
materials where SiC nanoclusters are associated to suitable polymer
matrices. Thus, oligoetheracrylate photopolymer and SiC based nanocomposites
show an enhanced non linear second order susceptibility. On the other hand,
SiC nanocrystals when associated with Poly-vinyl carbazol polymer induce
electro-optical signature of the nanocomposites. In these hybrid systems,
the interface between the polymer and nanocrystals play a key role in the
efficiency of the physical response. Improvment of the electro-optical
response is achieved by better composite film homogeneity and by using the
appropriate SiC nanoparticle sizes and interface states.

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1. Synthesis of SiC Nanoparticles and Optical Properties