Terahertz surface plasmon polaritons in textured metal surfaces formed by square arrays of metallic pillars |
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| Authors: | Zhen Gao Linfang Shen Jin-Jei Wu Tzong-Jer Yang Xiaodong Zheng |
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| Institution: | 1. Department of Information Science and Electronic Engineering, Zhejiang University, Zhejiang Province, Hangzhou 310027, PR China;2. Department of Electrical Engineering, Chung Hua University, HsinChu 30012, Taiwan, PR China;3. Department of Optical Engineering, Zhejiang University, Zhejiang Province, Hangzhou 310027, PR China;1. College of Electronic and Information Engineering, Southwest University, Chongqing 400715, China;2. Center of Material Science, National University of Defense Technology, Changsha 410073, China;3. College of Artificial Intelligence, Southwest University, Chongqing 400715, China;4. Chongqing Research Institute, China Coal Technology & Engineering Group, Chongqing 400035, China;1. Department of Energy Systems Research, Ajou University, Suwon 443-749, Republic of Korea;2. Department of Physics, Ajou University, Suwon 443-749, Republic of Korea |
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| Abstract: | In this paper, we investigate numerically the characteristics of surface plasmon polaritons (SPPs) sustained by two-dimensional arrays of metallic pillars protruding out of planar metal surfaces at terahertz (THz) frequencies. Various shapes of the pillars are analyzed, and it is shown that the pillar shape only has weak influence on the dispersion of spoof SPPs. However, the loss of spoof SPPs is closely dependent on the pillar shape. It is also shown that spoof SPPs on textured surfaces with pillars can exhibit much better confinement than those on pierced surfaces with holes. |
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