测试科学与仪器2020，Vol.11Issue(2)：177-185,9.DOI:10.3969/j.issn.1674-8042.2020.02.010
基于钛酸锶的可调太赫兹超材料吸波器设计
Design of tunable terahertz metamaterial absorber based on strontium titanate
摘要
Abstract
Thermosensitive strontium titanate (SrTiO3 )as a ferroelectric crystal with great tunability in microwave and terahertz band shows unparalleled potential value.Utilizing the thermal electromagnetic tunability to achieve the intelligent manipulation,a thermal-tunable metamaterial with terahertz-band absorption based on SrTiO3 crystal was proposed in this paper.The absorbent metamaterial (AM)is formed by Floquet’s linear periodic arranged unit,which is composed of a metallic ground plane and embedded cross SrTiO3 material in rhombic metallic patch,and separated by FR-4 dielectric spacer.The broadband frequency tunability of AM was operated by changing the temperature.The permittivity of SrTiO3 was discussed in detail to illustrate how the reconfigurability with thermal transformation is generated.The numerical results show that the tunable broadband of the absorbent band has reached 90 GHz and the corresponding absorptivity is above 99% when the temperature increases from 280 K to 360 K.The resonance frequency will produce a blue-shift with the increase of the temperature.This paper presents a passive thermal-tunable metamaterial as a potential candidate for sensing,materials detection and frequency selective thermal emitters.关键词
超材料/SrTiO3/太赫兹频段/热可调吸收Key words
metamaterial/strontium titanate (SrTiO3 )/terahertz-band/thermal-tunable absorption分类
通用工业技术引用本文复制引用
于娟,张斌珍,段俊萍..基于钛酸锶的可调太赫兹超材料吸波器设计[J].测试科学与仪器,2020,11(2):177-185,9.基金项目
National Natural Science Foundation of China (No.U1637212 ) （No.U1637212 ）
National Defense Pre-research Foundation of China (No. 61404130402) （No. 61404130402）
Fund for "1331 Project"Key Subject Construction of Shanxi Province （）
Fund for Key Laboratory (No. 61428050104) （No. 61428050104）
