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  • Received: Jun. 8, 2020

    Accepted: Aug. 11, 2020

    Posted: Sep. 27, 2020

    Published Online: Sep. 29, 2020

    The Author Email: Jianjun Liu (jianjun.liu@hnu.edu.cn)

    DOI: 10.3788/COL202018.120501

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    Jie Sheng, Jianlan Xie, Jianjun Liu. Multiple super-resolution imaging in the second band of gradient lattice spacing photonic crystal flat lens[J]. Chinese Optics Letters, 2020, 18(12): 120501

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Chinese Optics Letters, Vol. 18, Issue 12, 120501 (2020)

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

Jie Sheng, Jianlan Xie, and Jianjun Liu*

Author Affiliations

  • 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, Changsha 410082, China

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.

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