基于二氧化钒的动态可调编码超表面  

Dynamically Tunable Coding Metasurface Based on Vanadium Dioxide

作　　者：耿文佳 任斌 刘欣[1] 武敏 费宏明[1] Geng Wenjia;Ren Bin;Liu Xin;Wu Min;Fei Hongming(School of Physics,Taiyuan University of Technology,Jinzhong 030024,Shanxi,China;Qingdao Innovation and Development Base,Harbin Engineering University,Qingdao 266000,Shandong,China;College of Information Engineering,Shanxi Vocational University of Engineering Science and Technology,Jinzhong 030619,Shanxi,China)

机构地区：[1]太原理工大学物理学院,山西晋中030024 [2]哈尔滨工程大学青岛创新发展基地,山东青岛266000 [3]山西工程科技职业大学信息工程学院,山西晋中030619

出　　处：《激光与光电子学进展》2025年第1期274-279,共6页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(11904255、U23A20375)。

摘　　要：编码超材料由于可以灵活调控电磁波而备受关注,同时为在频域内采用编码序列操纵电磁波提供了很高的自由度。提出了一种基于二氧化钒相变特性的动态吸收可调2-bit编码超表面。将二氧化钒的绝缘态定义为编码“0”,二氧化钒的金属态定义为编码“1”。当温度、光、电等外部条件发生变化导致二氧化钒的状态发生变化时,编码单元的编码状态也会随之变化。由4个编码单元两两集成的30×30编码阵列可以在0.5~2.5 THz频率范围内近场显示所需的图案。该新颖设计可以在电磁波频率发生改变时,利用超表面吸收电磁波来动态调整显示内容,这为频率选择器、信号加密等领域的电磁波操控提供了一种有效的方法。Coding metamaterials have attracted significant attention for their ability to flexibly modulate electromagnetic waves and provide a high degree of freedom for coding sequences to manipulate electromagnetic waves in the frequency domain.A dynamically absorbing 2-bit coding metasurface based on the phase transition properties of vanadium dioxide is presented.In this study,the insulating state of vanadium dioxide is defined as code“0”,and the metallic state of vanadium dioxide is defined as code“1”.When the state of vanadium dioxide changes due to changes in external conditions such as temperature,light,and electricity,the coding state of the coding particles also changes.A 30×30 coding array of four coding particles integrated two by two can display the desired pattern in the near-field in the frequency range of 0.5‒2.5 THz.The novel design in this study can dynamically adjust the display content by using the absorption of the metasurface when the frequency of the electromagnetic wave changes,which provides a effective method for electromagnetic wave manipulation in the fields of frequency selector and signal encryption.

关 键 词：编码超表面 二氧化钒 动态调整 吸收 

分 类 号：O441.4[理学—电磁学]