太赫兹辐射
材料科学
地平面
吸收(声学)
超材料
光电子学
电介质
制作
超材料吸收剂
光学
可调谐超材料
复合材料
物理
替代医学
天线(收音机)
病理
电信
医学
计算机科学
作者
Fabio Alves,Brian Kearney,Dragoslav Grbovic,Nickolay V. Lavrik,Gamani Karunasiri
摘要
Metamaterial absorbers with nearly 100% absorption in the terahertz (THz) spectral band have been designed and fabricated using a periodic array of aluminum (Al) squares and an Al ground plane separated by a thin silicon dioxide (SiO2) dielectric film. The entire structure is less than 1.6 mm thick making it suitable for the fabrication of microbolometers or bi-material sensors for THz imaging. Films with different dielectric layer thicknesses exhibited resonant absorption at 4.1, 4.2, and 4.5 THz with strengths of 98%, 95%, and 88%, respectively. The measured absorption spectra are in good agreement with simulations using finite element modeling.
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