红外与毫米波学报, 2011, 30 (5): 401, 网络出版: 2011-10-13  

Hg1-xCdxTe晶体生长及太赫兹性能研究

Growth and terahertz characterization of Hg1-xCdxTe crystal
作者单位
1 中国科学院上海技术物理研究所 红外成像材料与器件重点实验室,上海 200083
2 中国科学院上海技术物理研究所 红外物理国家重点实验室,上海 200083
摘要
利用移动加热区方法(THM)生长了不同Cd组分的Hg1-xCdxTe晶体,通过傅立叶光谱仪和太赫兹时域光谱系统,研究了不同Cd组分Hg1-xCdxTe晶体在红外波段和太赫兹波段的透射光谱.当Cd组分小于0.279时,Hg1-xCdxTe材料在0.2~1.5 THz波段透过率接近0.在0.9 THz附近观察到Hg1-xCdxTe晶体的TA声子振动模式.利用德鲁德(Drude)模型对实验值进行拟合,得出组分x=0.388和0.326的Hg1-xCdxTe晶体的载流子浓度,与测得的实验值较为吻合.
Abstract
Different composition Hg1-xCdxTe crystals were grown by THM method. The optical properties of Hg1-xCdxTe crystals were investigated by using the Fourier transform infrared spectroscopy and transmission mode THz time-domain spectroscopy. The transmission was approached to zero in 0.2~1.5 THz frequency range as Cd composition of Hg1-xCdxTe crystal was lower than 0.279. A TA phonon model of Hg1-xCdxTe crystal was observed at 0.9 THz. Drude model was applied for simulation, which fitted well with the experimental results. The carrier densities of the Hg1-xCdxTe (x=0.388 and 0.326) were also characterized, which agreed with the experimental results.

王仍, 林杏潮, 张莉萍, 张可锋, 焦翠灵, 陆液, 邵秀华, 李向阳, 葛进, 胡淑红, 戴宁. Hg1-xCdxTe晶体生长及太赫兹性能研究[J]. 红外与毫米波学报, 2011, 30(5): 401. WANG Reng, LIN Xing-Cao, ZHANG Li-Ping, ZHANG Ke-Feng, JIAO Cui-Ling, LU Ye, SHAO Xiu-Hua, LI Xiang-Yang, GE Jin, HU Shu-Hong, DAI Ning. Growth and terahertz characterization of Hg1-xCdxTe crystal[J]. Journal of Infrared and Millimeter Waves, 2011, 30(5): 401.

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