Active formatting modulation of electromagnetically induced transparency in metamaterials  

作　　者：Hao Sun Yuhua Tang Yuze Hu Jie You Hengzhu Liu Xin Zheng 孙豪;唐玉华;胡瑜泽;尤洁;刘衡竹;郑鑫(College of Computer,National University of Defense Technology,Changsha 410073,China;College of Advanced Interdisciplinary Studies,National University of Defense Technology,Changsha 410073,China;National Innovation Institute of Defense Technology,Beijing 100010,China)

机构地区：[1]College of Computer,National University of Defense Technology,Changsha 410073,China [2]College of Advanced Interdisciplinary Studies,National University of Defense Technology,Changsha 410073,China [3]National Innovation Institute of Defense Technology,Beijing 100010,China

出　　处：《Chinese Optics Letters》2020年第9期64-68,共5页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China (NSFC)(Nos. 11802339,11805276,61805282,61801498,11804387,and 11902358);the Scientific Researches Foundation of National University of Defense Technology (Nos. ZK16-03-59,ZK18-01-03,ZK18-03-36,ZK18-03-22);the Natural Science Foundation of Hunan Province (No. 2016JJ1021);the Hunan Provincial Innovation Foundation for Postgraduate (No. CX2018B006);the Open Director Fund of State Key Laboratory of Pulsed Power Laser Technology (No. SKL2018ZR05);the Open Research Fund of Hunan Provincial Key Laboratory of High Energy Technology (No. GNJGJS03);the Open Foundation of State Key Laboratory of Laser Interaction with Matter(No. SKLLIM1702);the Youth Talent Lifting Project(No. 17-JCJQ-QT-004)。

摘　　要：We experimentally demonstrate for the first time an active all-optical ultrafast modulation of electromagnetically induced transparency-like effect in a hybrid device of sapphire/Si/metamaterial. From numerical simulations, it can be deducted that the tuning process is attributed to the coupling between the dark mode existing in split-ring resonators and the bright mode existing in cut wire resonators. The transmission amplitude modulation is accompanied by the slow-light effect. In addition, the ultrafast formation process is measured to be as fast as 2 ps. This work should make an important contribution to novel chip-scale photonic devices and terahertz communications.

关 键 词：terahertz metamaterials ultrafast photoswitching electromagnetically induced transparency all-optical device 

分 类 号：O441[理学—电磁学] TN761[理学—物理] TB34[电子电信—电路与系统]