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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