Photorefractive Materials and Their Applications. Semiconductor Photorefractive Quantum Wells and Their Applications.

Semiconductor photorefractive quantum well (PR-QW) devices have high sensitivity and fast response because of large excitonic electrooptic effects and large carrier mobilities. Taking advantages of these attractive features, interesting applications using PR-QW devices as dynamic holographic media have been demonstrated. Here basic features of PR-QW devices, materials, and device configurations are reviewed. In addition, two important applications of PR-QW devices, adaptive vibration measurement and optical imaging through scattering media, are also discussed.