InAs量子线图案化准二维电子系统中近红外辐射诱导的圆形光电流效应
Circular photogalvanic effect induced by near-infrared radiation in InAs quantum wires patterned quasi two-dimensional electron system
摘要：
在这项工作中，我们研究了InAs/InAlAs量子线（QWRs）超晶格的光学激发结构与近红外辐射。通过改变室温下辐射的螺旋度，我们观察到了与结构的$C_{2v}$对称性相关的圆形光电流效应，这可能是由于在QWRs图案附近形成了准二维系统。Rashba项和Dresselhaus项的比值显示了准二维结构中自旋-轨道相互作用随QWR层沉积厚度的演化。
英文摘要：
In this work we investigated the InAs/InAlAs quantum wires (QWRs) superlattice by optically exciting the structure with near-infrared radiation. By varying the helicity of the radiation at room temperature we observed the circular photogalvanic effect related to the $C_{2v}$ symmetry of the structure, which could be attributed to the formation of a quasi two-dimensional system underlying in the vicinity of the QWRs pattern. The ratio of Rashba and Dresselhaus terms shows an evolution of the spin-orbit interaction in quasi two-dimensional structure with the QWR layer deposition thickness.
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