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Applied Physics 2021
石墨烯/六方氮化硼超晶格结构中的可调谐自旋霍尔效应
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Abstract:
通过在六方氮化硼的上表面铺上单层的石墨烯构建一个超晶格材料结构模型，我们在远红外频率区域获得了可调谐的自旋霍尔效应并研究了光束的入射角、光轴的倾斜角和化学势对其的影响。当入射角在布鲁斯特角附近时，在满足一定条件下自旋位移可达到极限值，并且所对应频率区域被极大拓宽。这些发现为纳米光学器件的应用提供了可能。
This paper designs a superlattice material structure by covering a monolayer of graphene on hexagonal boron nitride (hBN). In the far infrared frequency region, a tunable spin Hall effect is obtained. The effects of incident Angle, inclination Angle of optical axis and chemical potential on spin Hall effect are studied, respectively. When the incident Angle is near Brewster Angle, the spin displacement can reach the limit value under certain conditions, and the corresponding frequency region is greatly widened. These findings provide the possibility for the application of nano optical devices.
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