Surface Emitting THz Wave Parametrical Oscillator Using MgO：LiNbO3

作     者：张显斌 施卫 T. Ikari H. Ito 

作者机构：Department of Physics Xi'an University of Technology Xi'an 710048 Photo Dynamics Research Center RIKEN 519-1399 Aramaki-Aoba Sendai 980-8577 Japan 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2007年第24卷第11期

页      面：3153-3156页

核心收录：

学科分类：070207[理学-光学] 07[理学] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0704[理学-天文学] 0803[工学-光学工程] 0702[理学-物理学] 

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos 10390160  10376025 and 60771053  and the Natural Science Foundation of Shaanxi Province under Grant No 2005A03. The authors thank C. Takyu for coating the crystal surface and T. Shoji for polishing the crystals 

主　　题：coated conductor buffer layer self-epitaxy CeO2 

摘      要：Room-temperature operation terahertz （THz） wave source is demonstrated using three MgO：LiNbO3 crystals which have a noncollinear arrangement. The experimental results show that the THz wave can be tunable from 0.8 THz to 3.0 THz, and the peak energy output is 103 pJ/pulse at 1.5 THz. The noncoilinear cavity configuration makes the THz beam have Gaussian-like spatial distribution, small divergence angle, perpendicularly eradiated from the crystal surface. The beam quality factor M2 is measured to be Mx^2 = 1.15, Mx^2 = 1.25 for characterizing the THz wave beam. Experiments also show that the THz beam can be focused by using a polyethylene lens, and the focal spot size is close to the diffraction limit.