Active KTaO3 hybrid terahertz metamaterial

Liang Wu; Jinglong Liu; Hui Li; Chunfeng Ding; Ningning Xu; Xiaolei Zhao; Zongcheng Xu; Quan Sheng; Jianquan Yao; Jining Li; Xin Ding; Weili Zhang

doi:10.1038/s41598-017-05529-0

Scientific Reports (Jul 2017)

Active KTaO3 hybrid terahertz metamaterial

Liang Wu,
Jinglong Liu,
Hui Li,
Chunfeng Ding,
Ningning Xu,
Xiaolei Zhao,
Zongcheng Xu,
Quan Sheng,
Jianquan Yao,
Jining Li,
Xin Ding,
Weili Zhang

Affiliations

Liang Wu: College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Key Laboratory of Optoelectronics Information and Technology (Ministry of Education)
Jinglong Liu: College of Physics, Jilin University
Hui Li: College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Key Laboratory of Optoelectronics Information and Technology (Ministry of Education)
Chunfeng Ding: Henan Key Laboratory of Laser and Opto-electric Information Technology, Zhengzhou University
Ningning Xu: School of Electrical and Computer Engineering, Oklahoma State University
Xiaolei Zhao: College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Key Laboratory of Optoelectronics Information and Technology (Ministry of Education)
Zongcheng Xu: College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Key Laboratory of Optoelectronics Information and Technology (Ministry of Education)
Quan Sheng: College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Key Laboratory of Optoelectronics Information and Technology (Ministry of Education)
Jianquan Yao: College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Key Laboratory of Optoelectronics Information and Technology (Ministry of Education)
Jining Li: College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Key Laboratory of Optoelectronics Information and Technology (Ministry of Education)
Xin Ding: College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Key Laboratory of Optoelectronics Information and Technology (Ministry of Education)
Weili Zhang: College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Key Laboratory of Optoelectronics Information and Technology (Ministry of Education)

DOI: https://doi.org/10.1038/s41598-017-05529-0
Journal volume & issue: Vol. 7, no. 1
pp. 1 – 5

Abstract

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Abstract The dielectric properties of an active KTaO3 hybrid metamaterial structure and its tunability under external electric fields are investigated at room temperature by means of terahertz time-domain spectroscopy. Application of the electric field leads to an appreciable tuning of the dielectric loss, which is up to 17%. Meanwhile, the refractive index also changes appreciably. These findings are attributed to the internal space charge field in the crystal caused by the excited free carriers.

Published in Scientific Reports

ISSN: 2045-2322 (Online)
Publisher: Nature Portfolio
Country of publisher: United Kingdom
LCC subjects: Medicine; Science
Website: https://www.nature.com/srep/

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