Major improvements of the photorefractive and photovoltaic properties in potassium

被引:9
作者
Evans, DR [1 ]
Cook, G
Carns, JL
Saleh, MA
Basun, SA
Seim, JM
Mizell, GJ
机构
[1] AF Res Lab, Wright Patterson AFB, OH 45433 USA
[2] Univ Technol Corp, Dayton, OH 45432 USA
[3] Anteon Corp, Dayton, OH 45431 USA
[4] UES Inc, Dayton, OH 45432 USA
[5] AF Ioffe Phys Tech Inst, St Petersburg 194021, Russia
[6] VLOC, New Port Richey, FL 34655 USA
关键词
D O I
10.1364/OL.31.000089
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Optical and electrical measurements have been made on a new codoped potassium niobate crystal (KNbO3:Fe,Ag) that yields a significant enhancement of the photorefractive and photovoltaic effects when compared with the published results for singly doped potassium niobate crystals. The codoped Ag impurity enters the K site, rather than the typical Nb site, thus changing the local field in the lattice. It is believed that Fe perturbed by the Ag in the K site is responsible for an enhancement of the linear absorption and photocurrent, as well as a probable increase in the effective trap density. An enhanced trap density is likely the cause of the increased photorefractive counterpropagating two-beam coupling efficiency. (c) 2006 Optical Society of America.
引用
收藏
页码:89 / 91
页数:3
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