Right-Angle Shaped Elements as Dual-Band Metamaterial Absorber in Terahertz

• 来源期刊: 光子传感器（英文版）
• 关键词: Metamaterial absorbance photonics devices terahertz
• 年，卷（期）: 2020,（3）
• 页码范围: 233-241
• 页数: 9页
• 语种: 英文
• DOI: 10.1007/s13320-019-0573-6

摘要

Metamaterial absorbers display potential applications in the field of photonics and have been investigated extensively during the last decade.We propose a dual-band resonant metamaterial absorber with right-angle shaped elements (RAEs) in the terahertz range based on numerical simulations.The absorber remains insensitive to a wide range of incidence angles (0°-70°) by showing a minimum absorbance of ～80％ at 70°.Furthermore,the proposed absorber is highly independent on any state of polarization of the incidence electromagnetic wave due to the high absorbance,i.e.,greater than 80％,recorded for the considered polarization states.To further comprehend the slight variations in absorbance as a function of change in the angle of incidence,the impedance of the structure has been critically examined.The metamaterial absorber is simple in design,and we provide a possible path of fabrication.