Hologram decay in LiNbO3 : Fe with a time varying conductivity

摘要

Hologram decay results are presented concerning a time varying decay rate which can be explained on the basis of a time dependent conductivity given by σ=σ0+σ1 exp(-t/τT). An analysis based on this assumption describes the data well, giving strong support for the existence of a persistent photoconductivity component during decay. The effective time constant τeff ? lnη/∂t)-1 is dicsussed in terms of this component and the dark conductivity.