• 文献标题:   A wavelength demultiplexing structure based on graphene nanoribbon resonators
  • 文献类型:   Article
  • 作  者:   ZHUANG HW, SHENG SW, KONG FM, LI K, WANG YL
  • 作者关键词:   graphene, wavelength demultiplexing, coupledmode theory, reflection structure
  • 出版物名称:   OPTICS COMMUNICATIONS
  • ISSN:   0030-4018 EI 1873-0310
  • 通讯作者地址:   Shandong Jianzhu Univ
  • 被引频次:   6
  • DOI:   10.1016/j.optcom.2016.07.056
  • 出版年:   2016

▎ 摘  要

A wavelength demultiplexing (WDM) structure based on graphene nanoribbon resonators is proposed and numerically investigated by the finite-difference time-domain (FDTD) method. The demultiplexing wavelength can be easily derived by adjusting the length of the resonator, which is accurately explained by the Fabry-Perot (F-P) resonant theory. Meanwhile, the transmission characteristics of the WDM structure are influenced by the coupling distance between the resonator and drop/bus waveguides, and the performance of the WDM device is analyzed at different nanoribbon width and chemical potential. In addition, in order to improve the transmission efficiency from the drop waveguide, a reflection structure is introduced at the end of the bus waveguide. The exact mechanism for the WDM structure is analyzed in detail using the temporal coupled-mode theory. The proposed structure will have potential applications in the field of ultra-compact WDM systems in highly integrated optical circuits. (C) 2016 Elsevier B.V. All rights reserved.