Circuit Model for Plasmons on Graphene With One-Dimensional Conductivity Profile
Circuit Model for Plasmons on Graphene With One-Dimensional Conductivity Profile
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DOI：
10.1109/lpt.2015.2496249
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发表时间：
2016-02
影响因子：
2.6
通讯作者：
Saeed Farajollahi;Sajjad Abdollahramezani;Kamalodin Arik;Behzad Rejae;A. Khavasi
中科院分区：
文献类型：
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作者：
Saeed Farajollahi;Sajjad Abdollahramezani;Kamalodin Arik;Behzad Rejae;A. Khavasi
研究了在石墨烯表面电导率中，通常入射线不连续的石墨烯表面等离子体的散射。研究了过渡区长度对反射系数和透射系数的影响。结果表明，加宽过渡区可以减小反射系数。在此基础上，推导了石墨烯片的传输线模型，其中不连续用简单电路表示。该模型接下来将用于设计基于石墨烯的带通和带阻滤波器，在太赫兹范围内具有任意带宽。
The scattering of graphene surface plasmons normally incident on a line discontinuity in graphene surface conductivity is investigated. The effect of the length of the transition region on the reflection and transmission coefficients is studied. It is shown that the reflection coefficient is reduced by widening the transition region. Based on the results obtained, a transmission line model is derived for the graphene sheet in which the discontinuity is represented by a simple circuit. This model is next used to design graphene-based bandpass and bandstop filters with arbitrary bandwidth in the terahertz regime.