摘要
提出了一种高度可调、宽角度且具有完美吸收和极化不敏感的超材料吸波体.模拟的结果显示,在5.8μm处可达到最高吸收率99.9%;通过改变其几何参数,吸波体的谐振波长在3.4μm到8.6μm的范围内可任意地调节,且都具有不低于95%的峰值吸收率.在横磁波下,当入射角度小于80°时,吸波体的吸收率保持在95%以上;在横电波下,当入射角小于60°时,吸收率保持在92%以上.此外,极化角度在0到90°变化时,吸波体具有极化不敏感性.
A highly-tunable wide-angle metamaterial absorber with perfect absorption and polarization-insensitivity was introduced and investigated. Simulative results showthe maximum absorption reaches up to 99. 9% at 5. 8 μm and the absorber can be tuned arbitrarily in the range of 3. 4 μm to 8. 6 μm with the absorption remaining above 95%by changing its geometric parameters. The absorber remains absorptivity of over 95% with incident angles below80°under transverse magnetic（ TM） polarization and that of over 92% below60° under transverse electric（ TE） polarization. Furthermore,the absorber is polarization insensitive with polarization angle varying from 0° to 90°.
出处
《红外与毫米波学报》
SCIE
EI
CAS
CSCD
北大核心
2015年第4期406-410,共5页
Journal of Infrared and Millimeter Waves
基金
Supported by National Natural Science Foundation fo China(62135006,61131005)
the fundamental Researc Funds for the Central Universities(ZYGX2012J058)
and Key Grant Project of Chinese Ministry of Education(313013)
关键词
超材料
吸波体
红外
可调谐
metamaterial
absorber
infrared
tunable
