标题：Optical properties and birefringence in LiInS2 in the terahertz frequency range
作者：Wang, Shanpeng; Liang, Qijun; Tao, Xutang; Dekorsy, Thomas
作者机构：[Wang, Shanpeng; Liang, Qijun; Dekorsy, Thomas] Univ Konstanz, Dept Phys, D-78457 Constance, Germany.; [Wang, Shanpeng; Liang, Qijun; Dekorsy, Thoma 更多
通讯作者地址：[Wang, SP]Univ Konstanz, Dept Phys, D-78457 Constance, Germany.
来源：OPTICAL MATERIALS EXPRESS
摘要：The birefringence of LiInS2 (LIS) crystals in the THz frequency region is investigated by THz time-domain spectroscopy (THz-TDS). The experimental results indicate that LIS has large birefringence and low absorption in the THz frequency region. The optical properties of LIS are quantitatively determined. A sharp absorption caused by a TO-phonon resonance is observed at around 1.70 THz when the Z-axis is parallel to the polarization of the incident THz wave. A temporal separation of the transmitted THz pulses with different polarization components is realized by changing the orientation of the LIS crystal with respect to the polarization of the incident THz pulses. By controlling the relative phase and amplitude of the temporally separated THz pulses, THz polarization pulse shaping caused by birefringence in LIS crystal is demonstrated. (C)2014 Optical Society of America