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双层石墨烯非对称波导中导模性质的分析

, PP. 507-512

Keywords: 光电子学,非对称导模,连续性条件,色散关系,双层石墨烯

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Abstract:

研究了基于双层石墨烯的非对称量子阱波导中导模的性质。当石墨烯中电子的入射能一定时,通过控制加在石墨烯不同区域的直流电压,可使狄拉克费米子在非对称波导中存在三种不同类型的运动方式,即准经典运动、量子克莱恩隧穿以及二者的混合运动。在解析推导出导模色散关系的基础上,详细讨论了三种不同情形下导模的结构特征。该研究结果对于石墨烯波导器件的实际应用具有重要意义。

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