助熔剂法生长非线性光学晶体Cd_3Zn_3B_4O_(12)及其性质研究(英文)

Flux Growth and Optical Properties of the NLO Cd_3Zn_3B_4O_(12) Crystal

本文以PbO-0.25B2O3为助熔剂,利用顶部籽晶法获得了较大块的Cd3Zn3B4O12单晶。透过率测试结果显示该晶体的紫外截止波长位于310 nm处。利用Kurtz-Perry的方法对晶体的倍频效应进行了测试,结果显示该晶体的粉末倍频效应约为KDP的5倍,且能实现相位匹配。晶体的光损伤阈值约为840 MW(1064 nm,10 ns)。该晶体的热分析结果显示Cd3Zn3B4O12晶体在熔点温度以上会产生分解,这也是阻碍高质量大块Cd3Zn3B4O12晶体生长最主要的因素。

Nonlinear optical crystal Cd3Zn3B4O12 was obtained by top seeded solution growth（TSSG） method using PbO-0.25B2O3 as flux.Transmission spectrum shows the UV cutoff for the as-grown crystal is about 310 nm.Second-harmonic generation（SHG） property measured by the Kurtz-Perry method indicates that Cd3Zn3B4O12 crystal could be phase matchable and the SHG efficiency is about 5 times as large as that of KDP.The surface damage threshold of the crystal is 840 MW/cm2 at 1064 nm for 10 ns.Differential thermal analysis confirms that Cd3Zn3B4O12 tends to decompose upon its melting point,which is the major factor constraint to grow high quality Cd3Zn3B4O12 crystal.