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BaWO₄晶体的拉曼光谱分析

Raman Spectra of BaWO₄ Crystal

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【Author】 LIU Feng-qin~1,XIA Hai-rui~(1,2),RAN Dong-gang~1,SUN Shang-qian~1,LING Zong-cheng~1,GE Wen-wei~(2,3),ZHANG Huai-jin~(2,3)(1.Department of Physics and microelectronics,Shandon University,Jinan 250100, P.R.China;2.State Key Lab of Crystal Material,Shandon University,Jinan 250100,P.R.China;3.Crystal Material Institute,Shandon University,Jinan 250100,P.R.China)

【机构】山东大学物理与微电子学院；山东大学晶体材料国家重点实验室；山东大学晶体材料国家重点实验室济南250100；济南250100；山东大学晶体材料研究所；

【摘要】 BaWO4晶体是一种很有应用前景的喇曼激光晶体。本文根据对称性分类,用商群理论分析了Ba-WO4晶体的喇曼光谱。一个原胞中含有两个BaWO4分子,理论上有36个振动膜,和我们用群论计算得数目一致。其中有18支拉曼活性光学膜。我们测得了10支拉曼峰,并对测得的各个配置的拉曼峰进行了指认,其中X(ZZ)X配置921cm-1处的喇曼峰强度最强,线宽较窄,对于作为喇曼激光晶体来讲是很有益的。更多还原

【Abstract】 In this paper Raman spectra of BaWO₄ crystal was analyzed in terms of group space theory.Thirty-six vibration modes were acquired.The primitive cell contains two formula units in BaWO₄ crystal.Therefore,it has thirty-six free degrees.The number of vibration modes is complied with that of the free degree. It was analyzed that BaWO₄ crystal has eighteen Raman-active optical spectra. It was acquired 10 Raman peaks from our experiment,and we analyzed one by one.It is found that at 921cm^-1,it has the strongest intensity and narrow bandwidth with the scattering configurations of X（ZZ）X.Therefore it is suitable for BaWO₄ crystal as the Raman laser crystal.更多还原