Photorefractive compositions are described. The compositions exhibit the following performances: a) Response time is less than 100 msec.; b) Initial diffraction efficiency is higher than 30%; and c) Grating holding ratio which is defined as [η(4 min.)/η(initial)]×100 is higher than 10%, wherein the η(4 min.) is a diffraction efficiency after 4 minutes and the η(initial) is an initial diffraction efficiency.
OPTICAL DEVICES RESPONSIVE TO NEAR INFRARED LASER AND METHODS OF MODULATING LIGHT
申请人:Wang Peng
公开号:US20100096603A1
公开(公告)日:2010-04-22
A photorefractive composition that is photorefractive upon irradiation by a near infrared (NIR) laser. The photorefractive composition comprises a sensitizer and a polymer comprising a repeating unit including at least a moiety selected from the group consisting of the formulae (Ia), (Ib) and (Ic), as defined herein. The photorefractive composition can be used in optical devices.