铌酸锂单晶的太赫兹光谱及光学常数之间的关系  

Terahertz Spectroscopy and Relationships of Optical Constants of Linbo3 Crystal

作　　者：毛宗良[1] 侯碧辉[2] 

机构地区：[1]贵州大学理学院,贵州贵阳550003 [2]北京工业大学应用数理学院,北京100022

出　　处：《贵州大学学报（自然科学版）》2010年第1期29-31,48,共4页Journal of Guizhou University:Natural Sciences

基　　金：国家自然科学基金资助项目(编号:10390160和39890390)

摘　　要：利用太赫兹时域光谱(THz-TDS)技术,对铌酸锂(LiNbO3)样品在0.4-1.6 THz范围的吸收系数和折射率进行测量和分析。实验样品为LiNbO3(clear),LiNbO3∶Fe(0.08%),LiNbO3∶Fe(0.1%)的晶体,三个样品均为(001)取向,观察和分析样品中掺入Fe对吸收系数和折射率等光学常数的影响,根据Debey近似模拟样品在低频吸收边的吸收结构系数。并利用光学常数之间的关系计算了样品在0.4-1.6 THz范围的介电常数(ν).The absorption coefficient and index of refraction of the LiNbO3 crystal was obtained and analyzed by terahertz time domain spectroscopy （THz-TDS） in the range of 0.4 - 1.6 THz. the samples include LiNbO3： clear, LiNbO3： Fe（0.08% ）, LiNbO3： Fe（0.1% ）, three samples are cut along （001） plane. The effect on the absorption and index of refraction of Fe-doping in the samples were observed and analyzed. Absorption index of structure of the samples were simulated in the low frequency absorption edge in terms of Debey approximation. In terms of the relationships of the optical constants, the dielectric constants of samples have been calculated in the range of 0.4 - 1.6 THz.

关 键 词：太赫兹 时域光谱 光学常数 铌酸锂晶体 

分 类 号：O472.3[理学—半导体物理]