Patent ID: 6252642
Filing Date: 2001-06-26
Classification: C09K,G02F

Abstract:
A method for aligning a polymer film, comprising the steps of:providing a substrate;forming a polymer film including an azo-dye on said substrate;applying a pump beam having a predetermined polarization state to said polymer film, modifying an arrangement of molecules of said polymer film, wherein a number of molecules of said polymer film arranged in a first direction parallel to a propagation direction of said pump beam and a number of molecules of said polymer film arranged in a second direction perpendicular to the propagation direction of said pump beam are controlled according to an intensity scale of an electric field of a major axis and an intensity scale of an electric field of a minor axis in said pump beam, and wherein as a ratio between the electric field scale of the major axis and the electric field scale of the minor axis approaches 1, the number of molecules of said polymer film arranged in said first direction increases exponentially.