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本文设计了一种内壁涂覆单层石墨烯的双椭圆形中空表面等离子波导,采用有限元的方法对其传输特性进行了研究。结果表明,椭圆之间的距离和半短轴的长度增大时,有效折射率的实部减小,传输距离增大,模式面积减小;圆化半径增大时,有效折射率的实部增大,传输距离减小,模式面积增大;工作频率增大时,有效折射率的实部减小,传输距离减小,模式面积减小;温度升高时,有效折射率先增大后减小,传输距离减小,模式面积减小。本文的工作为研究基于石墨烯的波导器件提供了理论依据。
In this paper, a double-elliptical hollow-surface plasmon waveguide with a single layer of graphene coated on the inner wall was designed and its transmission characteristics were studied by the finite element method. The results show that when the distance between ellipses and the length of semi-minor axis increase, the real part of effective refractive index decreases, the transmission distance increases and the mode area decreases. When the radius increases, the real part of effective refractive index When the working frequency increases, the real part of the effective refractive index decreases, the transmission distance decreases and the mode area decreases. When the temperature rises, the effective refractive index first increases and then decreases Small, the transmission distance decreases, mode area decreases. The work in this paper provides a theoretical basis for the study of graphene-based waveguide devices.