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石墨烯-六方氮化硼结构的古斯-汉欣位移

Goos-Hänchen shift in graphene-hexagonal boron nitride structure

  • 摘要: 为了研究由石墨烯覆盖半无限六方氮化硼结构中的古斯-汉欣位移性质,采用传输矩阵方法分析了结构参量对反射光古斯-汉欣位移的影响。结果表明, 通过合理调节石墨烯的化学势或层数,均可实现古斯-汉欣位移由正到负的一个转变;通过选取合适的参量,可实现较大的古斯-汉欣位移,其最大值约为波长的450倍。此研究结果对设计光开关、光学传感器件具有重要意义。

     

    Abstract: In order to study the properties of the Goos-Hnchen shift in semi-infinite hexagonal boron nitride covered by graphene, the influence of structural parameters on the Goos-Hnchen shift was analysised by using the transfer matrix method. The results show that: By reasonably adjusting the chemical potential or layer number of graphene, the transformation of Goos-Hnchen shift from positive to negative can be realized. By selecting the appropriate parameters, large Goos-Hnchen shifts can be realized and the maximum value is about 450 times of the wavelength. It is of great significance for the design of optical switches, optical couplers and other applications.

     

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