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Thermal broadband tunable Terahertz metamaterials

Authors:	Jun Zhu Jiaguang Han Zhen Tian Zhongyong Chen

Institution:	^a Center for Terahertz wave, Key laboratory of Opto-electronic Information Science and Technology, Ministry of Education, College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072, China ^b School of Physics and Electronic Information,Yunnan Normal University, Kunming 650092, China ^c School of Electrical and Computer Engineering, Oklahoma State University, Stillwater, OK 74078, USA

Abstract:	A thermally tunable metamaterial comprising a periodic array of metallic split-ring resonators with an embedded semiconductor has been proposed. The resonance frequencies of the metamaterial are demonstrated to be continuously tuned in the terahertz regime by increasing the temperature. The tunability is attributed to the temperature-dependent permittivity of the embedded semiconductor and well analyzed by an equivalent capacitor-inductor model. The proposed designs ensure broadband thermally tunable terahertz devices.

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