电子学报2025，Vol.53Issue(2)：395-408,14.DOI:10.12263/DZXB.20240847
基于VO2与光敏硅的双功能可切换THz超材料吸收器
Dual-Function Switchable THz Metamaterial Absorber Based on VO2 and Photosensitive Silicon
摘要
Abstract
Most of the traditional tunable terahertz broadband absorbers are characterized by complex structure and single function,which make their practical application scenarios limited.To address this problem,this paper proposes a bi-functional THz metamaterial absorber based on the thermal phase transition property of vanadium dioxide(VO2)and the pump light sensitivity property of photosensitive silicon(Si).By adjusting the conductivity of VO2 and Si,not only the dy-namic switching between broadband absorption and electromagnetically induced transparency(EIT)can be realized,but al-so the amplitude values of the absorption rate and the resonance peak of EIT can be dynamically adjusted.When σ(VO2)=2×105 S/m and σ(Si)=10 S/m,the absorber exhibits broadband absorption in the range of 1.24～3.65 THz with an average absorbance more than 94%.When σ(VO2)=20 S/m and σ(Si)=1×106 S/m,the transmittance transmission curve of the ab-sorber exhibits the EIT effect,which creates a resonant transparent window with an amplitude greater than 90%in the range of 1.50～2.50 THz.In addition,the physical mechanism of the absorber was further analyzed using impedance matching and equivalent circuit theory.Subsequently,the refractive index sensing characteristics of the EIT resonant peaks were ana-lyzed,and the sensing sensitivities of f1 and f2 were 224 GHz/RIU and 310 GHz/RIU with Q values of 3.82 and 18.5,respec-tively,which provided good sensing performance.Finally,the slow light effect of the EIT window is analyzed,and the re-sults show that the device has good slow light effect.With simple structure,wide operating bandwidth,large tunable range and dual-function switchable,the absorber proposed in this paper has potential future applications in the fields of optical de-vices,electromagnetic stealth and sensing detection.关键词
太赫兹/超材料吸收器/宽带吸收/电磁诱导透明Key words
terahertz/metamaterial absorber/broadband absorption/electromagnetic induced transparency分类
信息技术与安全科学引用本文复制引用
葛宏义,贾柯柯,蒋玉英,张元,季晓迪,贾志远,补雨薇,张玉洁..基于VO2与光敏硅的双功能可切换THz超材料吸收器[J].电子学报,2025,53(2):395-408,14.基金项目
国家自然科学基金(No.62271191,No.61975053) （No.62271191,No.61975053）
河南省自然科学基金(No.222300420040) （No.222300420040）
河南省重点科技计划项目(No.222102110246,No.222103810072) （No.222102110246,No.222103810072）
河南省高校科技创新人才支持计划资助项目(No.23HAS-TIT024,No.22HASTIT017) （No.23HAS-TIT024,No.22HASTIT017）
河南工业大学创新基金(No.2021ZKCJ04) National Natural Science Foundation of China(No.62271191,No.61975053) （No.2021ZKCJ04）
Natural Science Foundation of Henan(No.222300420040) （No.222300420040）
The Innovative Funds Plan of Henan University of Technology(No.2021ZKCJ04) （No.2021ZKCJ04）
Key Science and Technology Program of Henan Province(No.222102110246,No.222103810072) （No.222102110246,No.222103810072）
HASTIT(No.23HASTIT024,No.22HASTIT017) （No.23HASTIT024,No.22HASTIT017）
