Crosslinked films having electro-optic activity, compositions and compounds for making the films, methods for making the films, and devices that include the films are disclosed.

Nonlinear optical chromophores having thiophene-containing bridging groups between the electron-donating and electron-accepting ends of the chromophore are disclosed, including bridging groups which contain cyclic moieties in combination with conjugated double bonds between the electron-donating and electron-accepting ends of the chromophore.

Nonlinear optical chromophores having one or more diamondoid groups covalently attached to the chromophore, methods of making nonlinear optical chromophores, their use in thin films and electro-optical devices containing such nonlinear optical chromophores and thin films comprising the same.

A composition containing a nonlinear optically active copolymer, the composition including a solvent with which the nonlinear optically active copolymer is dissolved with high concentration and the composition obtained demonstrates good storage stability. A composition containing a nonlinear optically active copolymer, comprising a nonlinear optically active copolymer and a benzoate.

Nonlinear optical chromophores having one or more diamondoid groups covalently attached to the chromophore, methods of making nonlinear optical chromophores, their use in thin films and electro-optical devices containing such nonlinear optical chromophores and thin films comprising the same.

Electro-optic (EO) devices having an EO polymer core comprising a first host polymer and a first nonlinear optical chromophore (NLOC); and a cladding comprising a second host polymer and a second NLOC, and methods of preparing the same; wherein the first NLOC has a first bridge covalently bonded to an electron-accepting group and an electron-donating group; wherein the second NLOC has a second bridge covalently bonded to an electron-accepting group and an electron-donating group; and wherein the second bridge is less conjugated than the first bridge such that the cladding has an index of refraction that is less than that of the EO polymer core, and wherein the second NLOC is present in the second host polymer in a concentration such that the cladding has a conductivity equal to or greater than at least 10% of the conductivity of the EO polymer core at a poling temperature.

Nonlinear optical chromophores having one or more diamondoid groups covalentiy attached to the chromophore, methods of making nonlinear optical chromophores, their use in thin films and electro-optical devices containing such nonlinear optical chromophores and thin films comprising the same.