Broadband Terahertz Transparency in a Switchable Metasurface

IEEE Photonics Journal

Zhen Tian¹  Fengping Yan¹  Chunmei Ouyang²  Siyu Tan²  Ningning Xu³  Weili Zhang³  Xiaoqiang Su³  Jiaguang Han⁴  Jianqiang Gu⁴ 

[1] Comput. Eng., Oklahoma State Univ., Stillwater, OK, USA;Technol., Tianjin Univ., Tianjin, China;;Key Lab. of Optoelectron. Inf. &;Sch. of Electr. &

关键词: Metamaterials;    optical manipulation;    metasurface;    plasmon induced transparency;   

DOI  :  10.1109/JPHOT.2015.2390146

来源: DOAJ

【 摘 要 】

Plasmon-induced transparency in terahertz metamaterials markedly modifies the dispersive properties of an otherwise opaque medium and reveals unprecedented prospects on novel functional components. However, plasmon-induced transparency in metamaterials so far exists in a narrow frequency band or without actively tunable abilities. Here, we demonstrate optical control of a broadband plasmon-induced transparency in a hybrid metamaterial made from integrated silicon-metal unit cells. Attributed to the modification in damping rate of the dark mode resonators under optical excitation, a giant dynamic amplitude modulation of the broadband transparency window is observed. The scheme suggested here is promising in developing broadband active slow-light devices and realizing on-to-off switching responses of the terahertz radiation at room temperature.

【 授权许可】

Unknown