中国物理B ›› 2017, Vol. 26 ›› Issue (11): 114101-114101.doi: 10.1088/1674-1056/26/11/114101

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

An electrically tunable metasurface integrated with graphene for mid-infrared light modulation

Zongpeng Wang(王宗鹏), Ya Deng(邓娅), LianFeng Sun(孙连峰)   

  1. 1. State Key Laboratory for Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, China;
    2. National Center for Nanoscience and Technology, Beijing 100871, China
  • 收稿日期:2017-05-05 修回日期:2017-06-22 出版日期:2017-11-05 发布日期:2017-11-05
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 11174062 and 51472057).

An electrically tunable metasurface integrated with graphene for mid-infrared light modulation

Zongpeng Wang(王宗鹏)1, Ya Deng(邓娅)2, LianFeng Sun(孙连峰)2   

  1. 1. State Key Laboratory for Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, China;
    2. National Center for Nanoscience and Technology, Beijing 100871, China
  • Received:2017-05-05 Revised:2017-06-22 Online:2017-11-05 Published:2017-11-05
  • Contact: LianFeng Sun E-mail:slf@nanoctr.cn
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 11174062 and 51472057).

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摘要：

We propose a low-cost plasmonic metasurface integrated with single-layer graphene for dynamic modulation of mid-infrared light. The plasmonic metasurface is composed of an array of split magnetic resonators (MRs) where a nano slit is included. Extraordinary optical transmission (EOT) through the deep subwavelength slit is observed by excitation of magnetic plasmons in the split MRs. Furthermore, the introduction of the slit provides strongly enhanced fields around the graphene layer, leading to a large tuning effect on the EOT by changing the Fermi energy of the graphene. The proposed metasurface can be utilized as an optical modulator with a broad modulation width (15 μm) or an optical switch with a high on/off ratio (>100). Meanwhile, the overall thickness of the metasurface is 430 nm, which is tens of times smaller than the operating wavelength. This work may have potential applications in mid-infrared optoelectrical devices and give insights into reconfigurable flat optics and optoelectronics.

关键词: metasurface, graphene, optical modulator, magnetic plasmon

Abstract:

We propose a low-cost plasmonic metasurface integrated with single-layer graphene for dynamic modulation of mid-infrared light. The plasmonic metasurface is composed of an array of split magnetic resonators (MRs) where a nano slit is included. Extraordinary optical transmission (EOT) through the deep subwavelength slit is observed by excitation of magnetic plasmons in the split MRs. Furthermore, the introduction of the slit provides strongly enhanced fields around the graphene layer, leading to a large tuning effect on the EOT by changing the Fermi energy of the graphene. The proposed metasurface can be utilized as an optical modulator with a broad modulation width (15 μm) or an optical switch with a high on/off ratio (>100). Meanwhile, the overall thickness of the metasurface is 430 nm, which is tens of times smaller than the operating wavelength. This work may have potential applications in mid-infrared optoelectrical devices and give insights into reconfigurable flat optics and optoelectronics.

Key words: metasurface, graphene, optical modulator, magnetic plasmon

中图分类号:  (Electromagnetic wave propagation; radiowave propagation)

  • 41.20.Jb
42.25.Bs (Wave propagation, transmission and absorption) 81.05.ue (Graphene)