摘要
基于二氧化钒(VO2)的温致金属-绝缘体相变特性,利用双开口谐振环,设计了透射频率可调的太赫兹器件。利用时域有限差分法(FDTD)理论研究了该结构的透射特性。结果表明,当外界温度从25℃升高至85℃,超过二氧化钒的相变温度(68℃)时,在0.63 THz和1.91 THz处的透射率由6.3%和0.5%增加至66.6%和45.2%,调制深度分别达到82.7%和97.8%,表现出良好的可调特性。具体分析了谐振吸收的机理以及温度调控的过程。
A terahertz(THz)device with tunable transmission frequency was designed based on the metal-insulator phase transition characteristics of VO2 and double split ring resonator.The transmission characteristics of the structure are studied by using the finite-difference time-domain(FDTD)theory.The results show that when the external temperature rises from 25℃to 85℃and exceeds the phase transition temperature of VO2(68℃),the transmittivity at 0.63 THz and 1.91 THz increases from 6.3%and 0.5%to 66.6%and 45.2%,and the modulation depth reaches 82.7%and 97.8%respectively,showing good tunable characteristics.The mechanism of resonant absorption and the process of temperature control are analyzed.
作者
陈善卓
宋阳
高亚臣
Chen Shanzhuo;Song Yang;Gao Yachen(College of Electronic Engineering,Heilongjiang University,Harbin 150080,China;Department of Information Engineering,Chaoyang Teachers′College,Chaoyang 122000,China)
出处
《电子技术应用》
2020年第9期132-136,共5页
Application of Electronic Technique
基金
黑龙江省自然科学基金(F2018027)
黑龙江大学大学生创新项目(2019010)。
关键词
二氧化钒
太赫兹透射
双开口谐振环
时域有限差分法
VO2
terahertz transmission
double split ring resonator
finite difference time domain method
