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Multiple super-resolution imaging in the second band of gradient lattice spacing photonic crystal flat lens

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【Author】 Jie Sheng;Jianlan Xie;Jianjun Liu;Key Laboratory for Micro/Nano Optoelectronic Devices of Ministry of Education & Hunan Provincial Key Laboratory of Low-Dimensional Structural Physics and Devices, School of Physics and Electronics, Hunan University;

【通讯作者】刘建军;

【机构】 Key Laboratory for Micro/Nano Optoelectronic Devices of Ministry of Education & Hunan Provincial Key Laboratory of Low-Dimensional Structural Physics and Devices, School of Physics and Electronics, Hunan University；

【摘要】 Based on the triangular lattice two-dimensional photonic crystal(PC), the lattice spacing along the transverse direction to propagation is altered, and a gradient PC(GPC) flat lens is designed. The band structures and equal frequency curves of the GPC are calculated; then, the imaging mechanism and feasibility are analyzed. The imaging characteristics of the GPC flat lens are investigated. It is observed that the GPC can achieve multiple types of super-resolution imaging for the point source. This GPC lens is allowed to be applied to imaging and other fields such as filtering and sensing.更多还原

【Abstract】 Based on the triangular lattice two-dimensional photonic crystal(PC), the lattice spacing along the transverse direction to propagation is altered, and a gradient PC(GPC) flat lens is designed. The band structures and equal frequency curves of the GPC are calculated; then, the imaging mechanism and feasibility are analyzed. The imaging characteristics of the GPC flat lens are investigated. It is observed that the GPC can achieve multiple types of super-resolution imaging for the point source. This GPC lens is allowed to be applied to imaging and other fields such as filtering and sensing.更多还原

【关键词】 photonic crystal； super-resolution imaging； flat lens； negative refraction； gradient lattice spacing；
【Key words】 photonic crystal； super-resolution imaging； flat lens； negative refraction； gradient lattice spacing；

【基金】 supported by the National Natural Science Foundation of China (No. 61405058);the Natural Science Foundation of Hunan Province (Nos. 2017JJ2048and 2020JJ4161);the Fundamental Research Funds for the Central Universities (No. 531118040112)

【文献出处】 Chinese Optics Letters ,中国光学快报(英文版) , 编辑部邮箱 ,2020年12期

【分类号】O734;TP391.41
【被引频次】6
【下载频次】10

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