• 文献标题:   Narrow-band enhanced absorption of monolayer graphene at near-infrared (NIR) sandwiched by dual gratings
  • 文献类型:   Article
  • 作  者:   ZHENG GG, ZHANG HJ, BU LB
  • 作者关键词:   monolayer graphene, light absorption, nearinfrared, rigorous coupledwave analysi
  • 出版物名称:   PLASMONICS
  • ISSN:   1557-1955 EI 1557-1963
  • 通讯作者地址:   Nanjing Univ Informat Sci Technol
  • 被引频次:   8
  • DOI:   10.1007/s11468-016-0260-z
  • 出版年:   2017

▎ 摘  要

One possibility of enhancing light absorption in monolayer graphene at near-infrared (NIR) wavelength region with grating structures is proposed and investigated. It is demonstrated that it is possible to achieve near-perfect absorption when a single monolayer graphene is sandwiched between two gratings with optimized geometric parameters at normal incidence for transverse electric (TE) polarization. By means of the rigorous coupled-wave analysis (RCWA), the effects of technological tolerances on the optical response of the structure by varying geometric parameters and incident angle are studied. The proposed photonic structure could be efficiently exploited as a building block for innovative optical absorbers or photodetectors in combination with active materials.