Ultrabroad Band Rainbow Capture and Releasing in Graded Chemical Potential Distributed Graphene Monolayer

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• 作者：Weibin Qiu ; Xianhe Liu ; Jing Zhao ; Yixin Huang ; Houbo Chen ; Bin Li…
• 关键词：Rainbow capture ; Graphene ; Graded chemical potential ; Tunable ; Broadband
• 刊名：Plasmonics
• 出版年：2015
• 出版时间：October 2015
• 年：2015
• 卷：10
• 期：5
• 页码：1023-1028
• 全文大小：671 KB
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• 作者单位：Weibin Qiu (1)
  Xianhe Liu (1)
  Jing Zhao (1)
  Yixin Huang (1)
  Houbo Chen (1)
  Bin Li (1)
  Jia-Xian Wang (1)
  Qiang Kan (2)
  Jiao-Qing Pan (2)
  
  1. College of Information Science and Engineering, Huaqiao University, No.668, Jimei Avenue, Jimei, Xiamen, 361021, China
  2. Institute of Semiconductors, Chinese Academy of Science, No.35A, Qinghua East Road, Haidian, Beijing, 100086, China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Biotechnology
  Nanotechnology
  Biophysics and Biomedical Physics
  Biochemistry
  
• 出版者：Springer US
• ISSN：1557-1963

文摘

We propose and numerically analyze a scheme to trap a broadband surface plasmon polariton (SPP) wave on a sheet of monolayer graphene with gradient chemical potential distribution. Different frequency components of the incident wave are trapped at different locations according to the chemical potential, resulting in “rainbow trapping-effect. By appropriately tuning the chemical potential distribution over the graphene sheet, graphene conductivity distribution is modified so that the trapped SPP wave is released. In the proposed structure, the group velocity of the trapped SPP waves is as low as the 10? times of the light speed in free space, and the lifetime of the trapped SPP wave is 3.14 ps when the relaxation of the graphene is 0.5 ps. This slow light system offers advantages simultaneously including broadband operation, ultracompact footprint, and dynamic control of group velocity without any complicated and expensive device geometry engineering. Keywords Rainbow capture Graphene Graded chemical potential Tunable Broadband