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DF: Fachverband Dielektrische Festkörper
DF 2: Optical and nonlinear optical properties, photonic
DF 2.2: Talk
Monday, March 31, 2014, 10:50–11:10, GER 37
THz Polarization Pulse Shaping by Birefringence in LiInS2 Crystal — •Qijun Liang1, Shanpeng Wang2, Xutang Tao2, and Thomas Dekorsy1 — 1Department of Physics and Center for Applied Photonics, University of Konstanz, D-78457 Konstanz, Germany — 2State Key Lab. of Crystal Materials, Shandong University, 250100 Jinan, China
The birefringence of LiInS2 crystal in the THz frequency region is investigated by THz time-domain spectroscopy. LiInS2 is a novel nonlinear biaxial crystal with high optical qualities such as large birefringence and low absorption in the THz frequency region. The optical properties of LiInS2 are quantitatively determined. A pronounced sharp absorption caused by a TO-phonon resonance is observed at around 1.70 THz when 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 LiInS2 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 LiInS2 crystal is demonstrated.