Abstract

Hologram fixing from the presence of long-lived complementary gratings in photorefractive media is the topic of much research.¹ Many processes consist of two steps: the formation of a principal grating and the establishment of a complementary grating that screens the principal grating. In earlier work, Bashaw et al.¹ described the formation of long-lived, complementary gratings from two-level electron-hole transport in Bi₁₂SiO₂₀. This paper describes the role of two-level electron-hole transport in establishing complementary gratings.

© 1991 Optical Society of America