Ion exchange in KTiOPO4 crystals irradiated by copper and hydrogen ions.
Cs(+)-K+ ion exchanges were produced on KTiOPO4 crystals which is prior irradiated by Cu+ can H+ ions. The energy and dose of implanted Cu+ ions are 1.5 MeV and 0.5 x 10(14) ions/cm2, and that of H+ are 300 keV and 1 x 10(16) ions/cm2, respectively. The temperature of ions exchange is 430 degrees C, and the time range from 15 minutes to 30 minutes. The prism coupling method is used to measure the dark mode spectra of the samples. Compared with results of ion exchange on the sample without irradiations, both the number of guided mode and its corresponding effective refractive index are decreased. The experimental results indicate that the ion exchange rate closely related with the lattice damage and the damage layers formed in the depth of maximum nuclear energy deposition act as a barrier to block the ions diffuse into the sample and the concentration of defects can modify the speed of ion exchange..
School of Information Science and Engineering, Shandong University, Jinan, 250100, China. zhangrf@sdu.edu.cn
Ruifeng
R
Zhang
Fei
F
Lu
Jie
J
Lian
Hanping
H
Liu
Xiangzhi
X
Liu
Qingming
Q
Lu
Hongji
H
Ma
D002627:Chemistry, Physical / Q000379:methods; D003300:Copper / Q000737:chemistry*; D003460:Crystallization; D004563:Electrochemistry / Q000379:methods; D006859:Hydrogen / Q000737:chemistry*; D007474:Ion Exchange; D007477:Ions; D055095:Optics and Photonics; D013696:Temperature
D007477:Ions; D003300:Copper; D006859:Hydrogen