Zwitterionic molecules as doping chromophores for efficient photorefractive polymers

Zwitterionic or charge separated molecules with high ground state dipole mo ment can be very attractive as doping chromophores for low glass transition temperature photorefractive polymers. On a molecular level, measurements o n zwitterionic compounds in solution lead to high predicted factor of merit which we actually observe in a zwitterionic molecules doped polymer. (C) 1 999 Elsevier Science B.V. All rights reserved.