石墨烯
吸光度
太赫兹辐射
材料科学
宽带
费米能级
吸收(声学)
光电子学
极化(电化学)
光学
费米能量
物理
电子
纳米技术
化学
量子力学
物理化学
复合材料
作者
Longfang Ye,Xin Chen,Jianliang Zhuo,Feng Han,Qing Liu
标识
DOI:10.7567/apex.11.102201
摘要
We propose an actively tunable broadband perfect absorber using a square-patterned graphene–spacer–polysilicon–spacer–metal structure. The simulated results show that the absorber can reach nearly perfect broadband terahertz absorption with over 99.5% (90%) absorbance from 1.52 (1.27) to 2.23 (2.51) THz, corresponding to the normalized bandwidth of 37.5% (65.6%) under normal incidence with the graphene Fermi level of 0.7 eV. The absorption spectra show a clear independence of the polarization and the angle of incidence. By adjusting the graphene Fermi level from 0 to 0.7 eV, the peak absorbance can be continuously tuned from 15 to 100% without shifting the absorption frequency band.
科研通智能强力驱动
Strongly Powered by AbleSci AI