Mesomorphic polymer material usable in non linear optics

Claim 1

In an optoelectronic article, the improvement comprising using a mesomorphic polymeric material whose structure includes a skeleton to which side chains are attached, the material resulting from the association of a first and a second monomer, each of the monomers possessing an element of said skeleton and a side chain characteristic of this monomer, wherein: the skeleton is a polyacrylate, a polymethacrylate, a polychloroacrylate or a polysiloxane; the side chains are formed of an element specific to the monomers and a spacer allowing attachment thereof to the skeleton element; the spacer is of the type --(CH 2 ) n -- with 2≦n≦15 or --(CH 2 --CH 2 --O) n -- with 1≦n≦5; the element specific to the first monomer is a mesomorphogenic group having a positive dielectric anisotropy; the element specific to the second monomer is a group having the following structure: D-(delocalized π electron system)-A, where D is an electron donating group and A an electron accepting group, this specific element being joined to the spacer on the group D side.