Photochromic characteristic and optical molecular reorientation in conducti
ng polymers such as polyacetylene and poly(p-phenylenevinylene) derivatives
containing photochromic azobenzene moieties in the side chain have been st
udied. Upon irradiation of a linearly polarized light on these films, accom
panying with trans-cis isomerization of azobenzene, optical anisotropy is i
nduced.