Composition, nonlinear optical film, method for forming nonlinear optical film and optical modulator

Abstract

The object of this invention is to provide a composition and a nonlinear optical film capable of improving the nonlinear optical properties of a nonlinear optically active material. This invention relates to a composition comprising a nonlinear optically active material, a surfactant, and a solvent. The surfactant comprises a polysiloxane surfactant. The nonlinear optically active material comprises at least one of the following groups: compounds selected from those represented by formula (1) below, and nonlinear optically active polymers comprising monovalent or multivalent groups obtained by removing at least one hydrogen atom from the compounds represented by formula (1) below. The content of the polysiloxane surfactant is 3% by mass or less relative to the total solids content of the composition. (The definitions of each group in formula (1) are as described in the specification.)

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