砷酸钛氧铷单晶的散射光谱  

The Raman Spectra of Rubidium Titanyl Arsenate

作　　者：李丽霞[1] 王继扬[1] 崔伟红[1] 董胜明[1] 李翠平[1] 

机构地区：[1]山东大学环境工程系晶体材料国家重点实验室

出　　处：《光谱学与光谱分析》1999年第3期333-335,共3页Spectroscopy and Spectral Analysis

基　　金：国家科委攀登计划;高技术"863"项目

摘　　要：本文研究了砷酸钛氧铷ＲｂＴｉＯＡｓＯ４（简称ＲＴＡ）单晶在各种不同几何配置下的拉曼散射光谱，并与磷酸钛氧铷（ＲＴＰ）、砷酸钛氧钾（ＫＴＡ）、磷酸钛氧钾（ＫＴＰ）单晶的振动光谱进行了比较。通过比较对ＲＴＡ的振动模作了归属。从拉曼光谱大的散射强度可知，晶体有很强的非线性光学特性。最强的拉曼散射来自于ＴｉＯ６八面体。从ＡｓＯ４四面体的模式分裂可知，ＲＴＡ晶体中的ＡｓＯ４四面体的畸变要大于ＫＴＰ中的ＰＯ４。The raman spectra of rubidium titanyl arsenate(RTA) single crystal with different geometric arrangements were obtained and compared with those of rubidium titanyl phosphate(RTP),potassium titanyl arsenate(KTA) and potassium titanyl phosphate(KTP) single crystals.The assignments of various vibration modes were made according to the experimental results.The strong raman scattering intensity implies that RTA crystal possesses large nonlinear optical property and the strongest scattering is from the TiO 6 octahedron.From the mode splitting of AsO 4 tetrahedron,we conclude that the distortion of AsO 4 in RTA is larger than that of PO 4 in KTP.

关 键 词：砷酸钛氧铷 单晶 非线性光学 拉曼光谱 RTA 晶体 

分 类 号：O614.114[理学—无机化学]