Compact Terahertz Wave Collimator Design with Photonic Crystal Slabs  

作　　者：Zhen-Hai Wu Kang Xie Ping Jiang Jian-Chen Wan 

机构地区：[1]School of Optoelectronic Information, University of Electronic Science and Technology of China, Chengdu 610054, China [2]School of Information Engineering, HuangheScience and Technology College of China, Zhengzhou 450005, China

出　　处：《Journal of Electronic Science and Technology》2011年第3期227-230,共4页电子科技学刊（英文版）

基　　金：supported by the National Natural Science Foundation of China under Grant No.60588502

摘　　要：A compact terahertz （THz） wave collimator is proposed, which works under the frequency from 2.4 THz to 2.7 THz with a photonic crystal （PC） slab based on the self-collimation effect. The plane wave expansion （PWE） method is used to calculate the dispersion surfaces and the equal-frequency contours （EFCs） and optimize the structure. The propagation of the THz waves in the structure is simulated and the normalized transmission is calculated by using the finite-difference time-domain （FDTD） method with perfectly matched layer （PML） absorbing boundary conditions. Numerical simulations show that the designed collimator has a good collimation property and a high transmittance.A compact terahertz （THz） wave collimator is proposed, which works under the frequency from 2.4 THz to 2.7 THz with a photonic crystal （PC） slab based on the self-collimation effect. The plane wave expansion （PWE） method is used to calculate the dispersion surfaces and the equal-frequency contours （EFCs） and optimize the structure. The propagation of the THz waves in the structure is simulated and the normalized transmission is calculated by using the finite-difference time-domain （FDTD） method with perfectly matched layer （PML） absorbing boundary conditions. Numerical simulations show that the designed collimator has a good collimation property and a high transmittance.

关 键 词：Index Terms---Photonic crystals SELF-COLLIMATION Terahertz. 

分 类 号：TN011[电子电信—物理电子学] O441.4[理学—电磁学]