太赫兹全息成像的超表面设计算法研究  

Metasurface Design Algorithm Based on Terahertz Holographic Imaging

作　　者：马兰 廖云鸿 龚岩栋 Ma Lan;Liao YunHong;Gong YanDong(School of Instrument Science and Opto-Electronics Engineering,Beijing Information Science&Technology University,Beijing 100192,China)

机构地区：[1]北京信息科技大学仪器科学与光电工程学院,北京100192

出　　处：《激光与光电子学进展》2024年第12期19-32,共14页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(62075013);北京信息科技大学重点培育项目(2121YJPY209)。

摘　　要：全息成像基于干涉和衍射原理实现了对物体的振幅和相位信息的再现,得到了广泛的研究。超表面是人为设计的具有亚波长单元结构的新型材料,可以实现许多自然界中不具备的物理性质,可以通过超表面材料实现对电磁波相位和振幅的灵活调控,完成复杂的波前调控。超表面提升了传统空间光调制器在成像分辨率、成像效率、成像视场角等方面的性能。超表面材料的出现为研究太赫兹波段的全息成像提供了解决方案。首先介绍全息成像的基本光学原理,回顾近年来国内外对不同电磁波波段特别是太赫兹波段超表面全息成像中使用的算法的研究进展,介绍几种重要的超表面设计算法的基本原理和各种算法对成像效果的影响,并且对各种算法进行比较与总结,研究结果为选择太赫兹波段全息成像的超表面设计算法提供了参考。Based on the principles of interference and diffraction,holographic imaging has achieved the reconstruction of amplitude and phase information of objects and thus has been widely studied.Metasurface is a new material with a subwavelength unit structure,which can realize many physical properties that are not available in nature.Furthermore,it can flexibly adjust and control the phase and amplitude of electromagnetic waves and complete the complex wave front adjustment and control through metasurface materials.Moreover,metasurface enhances the performancs of traditional spatial light modulators in imaging resolution,imaging efficiency,and imaging field-of-view angle.Consequently,the emergence of metasurface materials provides a solution for studying holographic imaging in the terahertz band.Therefore,this study first introduces the basic optical principles of holographic imaging.It then reviews current research progress of algorithms used in metasurface holographic imaging in different electromagnetic wave bands,especially in the terahertz band,domestically and internationally.Furthermore,it introduces the basic principles of several common metasurface design algorithms and the impact of various algorithms on imaging results.Additionally,it provides a comparative analysis and summary of these algorithms,which provides a reference for selecting metasurface design algorithms for terahertz band holographic imaging.

关 键 词：太赫兹 超表面 全息成像 全息成像算法 

分 类 号：TN26[电子电信—物理电子学]