一种波长可调的近红外波段完美吸收体  

A Perfect Wavelength Tunable Absorber in NIR Band

作　　者：李娟[1] 孙剑[1] 傅頔 王爽[1] 冯玉涛[1] LI Juan;SUN Jian;FU Di;WANG Shuang;FENG Yu-tao(Key Laboratory of Spectral Imaging Technology of Chinese Academy of Sciences, Xi＇an Institute of Optics Precision Mechanics, Chinese Academy of Sciences, Xi＇an 710119, China)

机构地区：[1]中国科学院西安光学精密机械研究所中国科学院光谱成像技术重点实验室,西安710119

出　　处：《红外》2017年第11期1-4,10,共5页Infrared

基　　金：国家自然科学基金(41005019);"西部青年学者"人才基金(XAB 2016A07)

摘　　要：一般将电磁波完美吸收体简称为完美吸收体,它可用于很多行业。用有限时域差分法研究了一种可以在近红外波段工作的完美吸收体。模拟结果表明,这种完美吸收体可以实现98%的单峰1400 nm左右宽谱吸收,或者可以实现90%以上的1320 nm和1640 nm波长的双峰吸收效率。通过调节共振腔结构的大小可以调节吸收波长和吸收宽度。电磁波完美吸收体是一种背靠背双共振腔模式的完美吸收体,有非常广泛的应用前景。Perfect electromagnetic wave absorber is generally called perfect absorber for short. It can be used in many industries. A perfect absorber which can operate in Near Infrared（NIR） band is studied by finite-different time domain method. The simulation result shows that this perfect absorber can achieve98% absorbance for a single peak at the wavelength of 1400 nm or more than 90% absorbance for two peaks at the wavelengths of 1320 nm and 1640 nm. The absorption wavelength and absorption width can be tuned by adjusting the resonance cavity structure of the absorber. The perfect electromagnetic wave absorber is a perfect absorber with a back-to-back resonance cavity, which has a very wide application prospect.

关 键 词：完美吸收体 共振腔 时域有限差分 

分 类 号：TB30[一般工业技术—材料科学与工程]