A Broadband Achromatic Dielectric Planar Metalens in Mid-IR Range
作者机构：School of Resources and EnvironmentUniversity of Electronic Science and Technology of ChinaChengdu 610054China
出 版 物：《Photonic Sensors》 (光子传感器（英文版）)
年 卷 期：2023年第13卷第1期
页 面：76-84页
核心收录：
学科分类：080901[工学-物理电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 0803[工学-光学工程]
基 金：supported by the Key Research&Development Project of Sichuan Provincial Department of Science and Technology(Grant No.2021YFG0369) State Grid Science and Technology Project(Grant No.55700-202127198A-0-0-00)
主 题：Broadbands achromatic metalens mid-IR
摘 要：Metalens are planar lenses composed of the subwavelengthh arrays,which have unconventional and versatile functionalities to manipulate the light fields compared with the traditional *** is noted that the most metalens are designed in a monochromatic mode in the visible or mid-infrared range(mid-IR),however,the broadband range is needed in many practical applications,such as spectroscopy,sensing,and ***,we design and demonstrate a broadband achromatic dielectric metalens in the mid-IR range of 4μm-5μm for near diffraction-limited(1.0a)*** broadband achromatic propagation and focusing of the metalens are designed and simulated by constructing and optimizing the phase *** Pancharatnam-Berry(P-B)phases of all the elements contribute to the main phase increment of the whole phase profile of the *** additional phase is constructed and optimized by using the random search algorithm to obtain the optimized size of all the *** focusing efficiency of the achromatic metalens is also optimized and averaged as the result of phase optimization within a wide band for the building elements,while it is lowered comparing with the regular metalens without broadband achromatic *** this combined designing approach,various flat achromatic devices with the broadband metalens can find a new way for full-color detection and imaging.
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