Title :
Ultra-broadband terahertz perfect absorber
Author :
XiaoFei Zang;Cheng Shi;Yan Peng;YiMing Zhu
Author_Institution :
Shanghai Key Lab of Modern Optical System, University of Shanghai for Science and Technology, No.516 JunGong Road, Shanghai 200093, China
Abstract :
We propose three kinds of ultra-broadband terahertz (THz) perfect absorbers by fabricating gratings on heavily boron-doped silicon substrate. By optimizing the doping density, the absorption bandwidths are 1 THz, 1.5 THz, and 2.0 THz, respectively, with absorbance above 95%. The fundamental principles are mainly attributed to the antireflection effects, the grating diffractions and the air gap-mode resonance.
Keywords :
"Diffraction gratings","Diffraction","Gratings","Yttrium","Absorption","Arrays","Bandwidth"
Conference_Titel :
Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2015 40th International Conference on
Electronic_ISBN :
2162-2035
DOI :
10.1109/IRMMW-THz.2015.7327589
