Our observations of Bi2SiO20 show that refractive-index gratings can decay under uniform illumination at two separats rates. This paper presents calculations based on a model of photorefractivity with two photoactive levels that provides a natural explanation of the two-time constant grating decay. In these calculations the usual conduction or valence band model of a single-species photorefractive material1 is. generalized to include a second species of traps in which the charge carriers can recombine.

© 1983 Optical Society of America

PDF Article


You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
Login to access OSA Member Subscription