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Mid-infrared plasmon regulation based on graphene nanoribbons

HAN Jing GAO Yang JIAO Wei-yan FAN Guang-hua GAO Ya-chen

韩晶, 高扬, 焦威严, 范光华, 高亚臣. 基于石墨烯纳米带的中红外等离激元调控[J]. 中国光学, 2020, 13(3): 627-636. doi: 10.3788/CO.2019-0185
引用本文: 韩晶, 高扬, 焦威严, 范光华, 高亚臣. 基于石墨烯纳米带的中红外等离激元调控[J]. 中国光学, 2020, 13(3): 627-636. doi: 10.3788/CO.2019-0185
HAN Jing, GAO Yang, JIAO Wei-yan, FAN Guang-hua, GAO Ya-chen. Mid-infrared plasmon regulation based on graphene nanoribbons[J]. Chinese Optics, 2020, 13(3): 627-636. doi: 10.3788/CO.2019-0185
Citation: HAN Jing, GAO Yang, JIAO Wei-yan, FAN Guang-hua, GAO Ya-chen. Mid-infrared plasmon regulation based on graphene nanoribbons[J]. Chinese Optics, 2020, 13(3): 627-636. doi: 10.3788/CO.2019-0185

基于石墨烯纳米带的中红外等离激元调控

doi: 10.3788/CO.2019-0185
详细信息
  • 中图分类号: TN29

Mid-infrared plasmon regulation based on graphene nanoribbons

Funds: Supported by Natural Scientific Foundation of Heilongjiang Province (No. F2018027, No.LH2019F047)
More Information
    Author Bio:

    HAN Jing (1980—), female, born in Tianjin. She is a master and lecturer. She obtained her bachelor’s degree and master’s degree from Harbin Normal University in 2003 and 2006 respectively. She is mainly engaged in the research of micro-nano optics. E-mail: hanjing1980@163.com

    GAO Ya-chen (1969—), male, born in Chaoyang City, Liaoning Province. He is a doctor, professor and doctoral supervisor. He obtained his bachelor’s degree from Liaoning Normal University in 1992, and his master’s and doctor’s degrees from Harbin Institute of Technology in 2001 and 2005 respectively. He is mainly engaged in the research of nonlinear optical materials, laser spectroscopy, nano-photonics and other fields. E-mail: gaoyachen@hlju.edu.cn

    Corresponding author: gaoyachen@hlju.edu.cn
  • 摘要: 石墨烯在中红外和太赫兹波段可以产生表面等离激元,并且通过合理设计还可以对其表面等离激元进行调控。基于此,本文设计了一种共振可调结构。通过在电介质基底上沉积不同宽度的单层石墨烯条带,引入纳米尺度上的不连续性,从而有效控制石墨烯与光的相互作用。使用时域有限差分法对该结构的光谱和电磁场分布进行了理论研究。结果表明:当所设计的结构与入射光耦合时,会出现多个共振增强的吸收峰;改变每个周期内石墨烯条带的数目、带宽和带间距,可以控制共振峰的个数、位置和强度;另外,施加不同的偏置电压可以改变石墨烯带的费米能级,从而实现共振峰位置和强度的动态调控;该结构可以在较宽光谱范围内调控石墨烯等离激元。本文研究为设计中红外波段基于石墨烯的传感、滤波、吸收等器件提供了理论基础。
  • 图  1  具有栅极控制的石墨烯纳米条带阵列一个周期的示意图。纳米带的宽度分别为${w_1}$${w_2}$,带间距离为r

    Figure  1.  Schematic diagram of graphene nanoribbon array with grid control within one period. The widths of the nanoribbons are ${w_1}$ and ${w_2}$. The distance between the ribbons is $r$

    图  2  石墨烯纳米带结构的透射、反射、吸收(插图)光谱。纳米带宽度w1 = 200 nm,w2 = 100 nm,带间距离r = 100 nm

    Figure  2.  Transmission, reflection and absorption (illustration) spectra of graphene nanoribbon structure. The widths of the nanoribbons are w1 = 200 nm and w2 = 100 nm, respectively. The distance between the nanoribbons is r = 100 nm

    图  3  不同共振波长下,z方向电场强度Ez的分布图。入射光波长分别为11.92,8.51,6.25 μm

    Figure  3.  Distributions of the electric field intensity Ez in z direction at different resonance wavelengths. The wavelengths of incident light are 11.92, 8.51 and 6.25 μm respectively

    图  4  石墨烯纳米带间距变化时,结构的透射光谱

    Figure  4.  Transmission spectra of the structure when the distance between graphene nanoribbons changes

    图  5  (a)为结构侧视图。一个周期内有4条石墨烯纳米带。条带宽度分别为250 nm,200 nm,150 nm,100 nm。(b)为该结构的透射谱、反射谱

    Figure  5.  (a) Side view of the structure. There are four graphene nanoribbons in one period. The widths of the nanoribbons are 250 nm, 200 nm, 150 nm and 100 nm respectively. (b) Transmission and reflection spectra of the structure

    图  6  不同费米能级下,共振波长与石墨烯带宽度的关系

    Figure  6.  Relationship between resonant wavelength and graphene ribbon width at different fermi levels

    图  7  不同费米能级时,一个周期内4条石墨烯纳米带结构的透射光谱

    Figure  7.  Transmission spectra of structure with four graphene nanoribbons in a period at different Fermi levels

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出版历程
  • 收稿日期:  2019-09-17
  • 修回日期:  2019-10-21
  • 刊出日期:  2020-06-01

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