Understanding the optical and electrical properties of a new photorefractive potassium niobate crystal
Abstract
Optical and electrical measurements have been made on a new codoped potassium niobate crystal that yields a significant increase in linear absorption, photocurrent, and photorefractive beam coupling efficiency. The Ag impurity enters the K site, changing the local field in the lattice. The Fe in the Nb site, perturbed by the replacement of the next near-neighbor K with Ag, is responsible for the enhanced linear and nonlinear properties. The modified material parameters result in an increase of the photorefractive counter-propagating two-beam coupling efficiency.
- Publication:
-
Journal of Luminescence
- Pub Date:
- January 2006
- DOI:
- 10.1016/j.jlumin.2006.01.059
- Bibcode:
- 2006JLum..119..535E
- Keywords:
-
- Potassium niobate;
- Photorefractive;
- Photovoltaic;
- Two-beam coupling