Metamaterial terahertz device with temperature regulation function that can achieve perfect absorption and complete reflection conversion of ultrawideband

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外文摘要：The field of terahertz devices is important in terahertz technology.However,most of the current devices have limited functionality and poor performance.To improve device performance and achieve multifunctionality,we designed a terahertz device based on a combination of VO2 and metamaterials.This device can be tuned using the phase-transition characteristics of VO2,which is included in the triple-layer structure of the device,along with SiO2 and Au.The terahertz device exhibits various advantageous features,including broadband coverage,high absorption capability,dynamic tunability,simple structural design,polarization insensitivity,and incident-angle insensitivity.The simulation results showed that by controlling the temperature,the terahertz device achieved a thermal modulation range of spectral absorption from 0 to 0.99.At 313 K,the device exhibited complete reflection of terahertz waves.As the temperature increased,the absorption rate also increased.When the temperature reached 353 K,the device absorption rate exceeded 97.7％in the range of 5-8.55 THz.This study used the effective medium theory to elucidate the correlation between conductivity and temperature during the phase transition of VO2.Simultaneously,the variation in device performance was further elucidated by analyzing and depicting the intensity distribution of the electric field on the device surface at different temperatures.Furthermore,the impact of various structural parameters on device performance was examined,offering valuable insights and suggestions for selecting suitable parameter values in real-world applications.These characteristics render the device highly promising for applications in stealth technology,energy harvesting,modulation,and other related fields,thus showcasing its significant potential.

外文关键词：

terahertzperfect absorptioncomplete reflectiontemperature regulationultrawidebandsmart device

作者：

Hao Sun、Zao Yi、Can Ma、Shubo Cheng、Bin Tang、Qingdong Zeng、Sohail Ahmad

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作者单位：

School of Mathematics and Science,Joint Laboratory for Extreme Conditions Matter Properties,State Key Laboratory of Environment-Friendly Energy Materials,Tianfu Institute of Research and Innovation,Southwest University of Science and Technology,Mianyang 621010,China

Department of Oncology,Sichuan Science City Hospital,Mianyang,Sichuan Province,621000,China

School of Chemistry and Chemical Engineering,Jishou University,Jishou 416000,China

School of Physics and Optoelectronic Engineering,Yangtze University,Jingzhou,Hubei 434023,China

School of Microelectronics and Control Engineering,Changzhou University,Changzhou 213164,China

School of Physics and Electronic Information Engineering,Hubei Engineering University,Xiaogan 432000,China

Institute of Physics,Bahauddin Zakariya University,Multan 66000,Pakistan

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基金：

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaSichuan Science and Technology ProgramNatural Science Foundation of Fujian ProvinceResearch Project of Fashu FoundationOpen Fund of the Key Laboratory of Metallurgical Equipment and Control Technology of Ministry of Education in Wuhan University oGuangxi Key Laboratory of Precision Navigation Technology and Application,Guilin University of Electronic Technology

项目编号：

5160615811604311120741512021JDRC00222021J05202MFK23006MECOF2022B01DH202321

出版年：

2024

DOI：

10.1088/1572-9494/ad3b8d

理论物理通讯(英文版)

中国科学院理论物理研究所中国物理学会

理论物理通讯(英文版)

CSTPCD

影响因子：0.333

ISSN：0253-6102

年,卷(期)：2024.76(7)