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Light transmission through metal films perforated with arrays of asymmetric cross-shaped hole
Authors:Meng-Dong He  Jian-Qiang Liu  Zhi-Qiang Gong  Yong-Feng Luo  Xiaoshuang Chen
Institution:1. Institute of Mathematics and Physics, Central South University of Forestry and Technology, Changsha 410004, People’s Republic of China;2. National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Science, Shanghai 200083, People’s Republic of China;3. College of Science, Jiujiang University, Jiujiang, 332005, People’s Republic of China;1. Institute of Mathematics and Physics, Central South University of Forestry and Technology, Changsha, 410004, PR China;2. Department of Mathematics and Statistics, University of New Brunswick, Fredericton, New Brunswick, E3B 5A3, Canada;1. School of Science, Hunan University of Science and Engineering, Yongzhou 425100, China;2. Department of Materials Science, Fudan University, Shanghai 200433, China;3. School of Management, Hunan University of Commerce, Changsha 410205, China;4. Huangqiao Middle School of Dongkou County in Hunan Province, Shaoyang 422300, China;1. Department of Physics and Electronic Information Science, Huaihua University, Huaihua 418008, China;2. Department of Physics and Key Laboratory for Low-Dimensional Quantum Structures and Manipulation (Ministry of Education), Hunan Normal University, Changsha 410081, China;1. School of Materials Science and Engineering, Xiangtan University, Xiangtan 411105, China;2. Key Laboratory of Lightweight and Reliability Technology for Engineering Vehicle, The Education Department of Hunan Province, Changsha University of Science and Technology, Changsha 410114, China;3. College of Materials Science and Engineering, Hunan University, Changsha 410082, China
Abstract:The transmission characteristics of metallic film perforated with an array of asymmetric cross-shaped hole are studied by using the three-dimensional finite difference time-domain method. We find that the wavelengths and intensities of transmission peaks depend strongly on the asymmetric parameters of the cross-shaped hole. The transmission peaks in the structure of asymmetric cross-shaped hole array originate from the splitting of the transmission peak in the corresponding one of symmetric cross-shaped hole array. Moreover, it is also found that the transmission spectra can be adjusted by changing other geometrical parameters of asymmetric cross-shaped hole due to the their effect on the distribution of the oscillating charges on metal surfaces.
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