中文摘要：

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.

英文摘要：

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.