红外与毫米波学报2011，Vol.30Issue(4)：350-353,360,5.
太赫兹宽频带准全向平板超材料吸波体的设计
Design of a wide-band and quasi-omnidirectional tabulate metamaterial absorber in the terahertz regime
摘要
Abstract
We report the design of a wide-band and quasi-omnidirectional tabulate metamaterial absorber in the terahertz regime. Simulated results indicate that the absorber has a wide-band strong absorption between 4.36 and 4.91 THz, which is polarization insensitive and wide incident angle. Retrieved real parts of the impedance show that by adjusting the electromagnetic response of the metamaterial, the impedance of the absorber could be tuned to match approximatively the impedance of the free space on one side and do not match to the impedance of the free space on the other side, resulting in the minimal reflectance, the minimal transmission and the highest absorbance in the absorption band. Simulated absorbance values under three different loss conditions suggest that high absorbance is mainly due to metallic absorption and dielectric loss can be used to absorb partial energy if there is no metallic absorption. Simulated absorbance values under different electric conductivity values and copper thicknesses suggest that the intensity of metallic absorption can be boosted up by adopting metal of high conductivity or reducing the thickness of metal properly. This absorber may have broad applications in many scientific and technological fields.关键词
太赫兹/宽频带/极化不敏感/宽入射角Key words
terahertz/ wide-band/ polarization-insensitive/ wide-angle分类
数理科学引用本文复制引用
顾超,屈绍波,裴志斌,徐卓,柏鹏,彭卫东,林宝勤,周航..太赫兹宽频带准全向平板超材料吸波体的设计[J].红外与毫米波学报,2011,30(4):350-353,360,5.基金项目
国家自然科学基金(60871027,60901029,61071058) （60871027,60901029,61071058）
国家重点基础研究发展计划(2009CB623306) （2009CB623306）
陕西省自然科学基金(SJ08F01) （SJ08F01）
