Abstract
Two types of polyureas containing mono- and diazoaromatic groups in their main chains were synthesized via reactions between isophorone diisocyanate and corresponding diamines. Holographic gratings were fabricated on the polyurea films prepared by spin-coating from their solutions. Although the two polymers have relatively high glass transition temperatures (197$^{\circ}C$ and 236$^{\circ}C$), chromophore alignment was induced by laser beam irradiation at modest light in tensities. In a manner similar to low $T_g$ side-chain polymers regularly spaced surface relief gratings on the polymer film were also recorded upon exposure to an interference pattern of two polarized argon ion laser beams.
