We report the photorefractive properties of a new kind of Cu-doped KNSBN crystal in which a small fraction of oxygen (O) atoms are replaced with fluorine (F) atoms. The replacement of oxygen with fluorine in Cu:KNSBN crystals leads to a much shorter response time of 30 ms at an incident intensity of 5 W/cm2. We also discuss the effect of electron-hole competition on the coupling constant.
All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics