Photorefractive properties of potassium lithium niobate doped with copper
Abstract:Potassium lithium niobate doped with copper (Cu : KLN) were grown by the Czochralski method for the first time. The structure of Cu : KLN was measured by the x-ray powder diffraction method, and its lattice constants were obtained. The position of copper ions in KLN crystal was determined. The exponential gain coefficient, response time and erasure time were measured. It was found that the exponential gain coefficient of Cu : KLN is 10.5 cm–1, as two times high as that of KLN, and its response time of 1.53 s is one order of magnitude shorter than that of Cu : LiNbO3. The type of light exciting carriers in Cu : KLN has been investigated. The result showed that the electron acts the main role in Cu : KLN.
Document Type: Research Article
Affiliations: 1: Department of Applied Chemistry, Harbin Institute of Technology, Harbin 15001, China 2: Department of Electronic Science and Technology , Harbin Institute of Technology, Harbin 15001, China 3: Department of Physics, Nankai University, Tianjin 300071, China
Publication date: May 1, 2003