Transmissive reconfigurable metasurface enabling independent control of active and passive modules through weak coupling

作     者：KUN XUE HENG WEI CILEI ZHANG YONGHAO ZHANG HAOLIANG SUN SHAOHUA DONG KUN XUE;HENG WEI;CILEI ZHANG;YONGHAO ZHANG;HAOLIANG SUN;SHAOHUA DONG

作者机构：Peng Cheng LaboratoryShenzhen 518055China Department of Electrical and Computer EngineeringNational University of SingaporeSingapore 117583Singapore State Key Laboratory of Radio Frequency Heterogeneous IntegrationCollege of Electronics and Information EngineeringShenzhen UniversityShenzhen 518060China 

出 版 物：《Photonics Research》 (光子学研究（英文版）)

年 卷 期：2024年第12卷第7期

页      面：1449-1456页

核心收录：

学科分类：0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 

基　　金：National Key Research and Development Program of China (2020YFB1806405, 2023YFB2906102) Major Key Project of PCL (PCL2021A17, PCL2023A04) 

主　　题：modules coupling weakly 

摘      要：Metasurfaces have demonstrated rich electromagnetic control capabilities and degrees of freedom in past years. As is well known, for passive metasurfaces, their functionalities cannot be further expanded accordingly once prototypes are established. Therefore, reconfigurable metasurfaces, utilizing active devices to replace geometric changes in passive structures, have received widespread attention, especially with the development of wireless communication recently. In reconfigurable metasurfaces, artificial meta-atoms are composed of active devices and passive structures combined together. However, these two modules are usually utilized as a whole due to the tight coupling of the active devices and the passive structures, which results in passive structures not receiving sufficient attention and being utilized as independent degrees of freedom. In this article, we propose the concept of weakly coupled reconfigurable metasurfaces in transmissive systems, enabling independent control of active and passive modules through weak coupling. As the proof of concept, a simple weakly coupled system is proposed, which can realize the transmission wavefront engineering through the geometric changes of meta-structures in passive mode, while achieving switching between transmission and reflection states in active mode, respectively. Our exploration lies in making use of the physical structure, which is easily neglected in traditional reconfigurable metasurface design, emphasizing the collaborative work of active and passive modules, exploring more available variables within the same aperture, and providing a potential solution for balancing functionality and resource consumption in practical applications.