• 文献标题:   Slow Light Effect and Tunable Channel in Graphene Grating Plasmonic Waveguide
  • 文献类型:   Article
  • 作  者:   ZHANG YQ, LIU X, WU QH, LI WF, LI CL
  • 作者关键词:   slow light effect, graphene, surface plasmon polariton, normalized delay bandwidth product
  • 出版物名称:   PHOTONICS
  • ISSN:  
  • 通讯作者地址:  
  • 被引频次:   0
  • DOI:   10.3390/photonics9020054
  • 出版年:   2022

▎ 摘  要

A graphene plasmon waveguide composed of silicon grating substrate and a silica separator is proposed to generate the slow-light effect. A bias voltage is applied to tune the optical conductivity of graphene. The tunability of the slow-light working channel can be achieved due to the adjustable bias voltage. With an increase in the bias voltage, the working channel exhibited obvious linear blue-shift. The linear correlation coefficient between the working channel and the bias voltage was up to 0.9974. The average value of the normalized delay bandwidth product (NDBP) with different bias voltages was 3.61. In addition, we also studied the tunable group velocity at a specific working channel. Due to the tunability of this miniaturized waveguide structure, it can be used in a variety of applications including optical storage devices, optical buffers and optical switches.