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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >Tunable Tamm states at the interface of a 1D graphene-based photonic crystal and a nonlinear dielectric slab
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Tunable Tamm states at the interface of a 1D graphene-based photonic crystal and a nonlinear dielectric slab

机译:可调谐Tamm状态在基于1D石墨烯的光子晶体和非线性介电板的界面处

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摘要

We investigate the dispersion of the Tamm states at the interface of a 1D graphene-based photonic crystal and a nonlinear dielectric slab. We use the nonlinear transfer matrix method to obtain the dispersion of the Tamm states in both the graphene induced and Bragg gaps in the terahertz region. We explore the spectral tunability of the surface modes by adjusting parameters such as the thickness of the nonlinear slab, the intensity of the surface modes, and the chemical potential of graphene layers. We reveal that the penetration depth of the graphene induced bandgap modes in the uniform environment is several times greater than that of the conventional Bragg gap modes. Also, it is shown that we can improve the penetration depth of the surface modes by adjusting the thickness of the nonlinear slab, the intensity of the Tamm states, or the chemical potential of the graphene layers.
机译:我们研究了TAMM状态在基于1D石墨烯的光子晶体和非线性电介质板的界面处的分散。 我们使用非线性传递矩阵方法来获得TAMM状态在太赫兹区域中的石墨烯中的TAMM状态的分散。 我们通过调节非线性板坯的厚度,表面模式的强度和石墨烯层的化学电位来探讨表面模式的光谱可调性。 我们揭示了均匀环境中的石墨烯感应带隙模式的穿透深度比传统布拉格差距模式大的几倍。 而且,示出了通过调节非线性板坯的厚度,TAMM状态的强度或石墨烯层的化学电位,我们可以通过调节非线性板的厚度来改善表面模式的穿透深度。

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