论文标题
半导体中自旋纹理上矢量涡流束的烙印空间螺旋结构
Imprinting spatial helicity structure of vector vortex beam on spin texture in semiconductors
论文作者
论文摘要
我们介绍了在半导体量子井中的拓扑结构光的空间变化向空间自旋纹理的转移。电子自旋纹理是一种圆形图案，其重复旋转和旋转状态的重复速率由拓扑电荷确定，它是由具有空间螺旋结构的矢量涡流束直接激发的。由于控制激发自旋模式的空间波数，生成的自旋纹理有效地变成了螺旋式旋转螺旋态的螺旋波模式。通过调整重复长度和方位角角度，我们同时通过单光束产生相反的旋转波。
We present the transfer of the spatially variant polarization of topologically structured light to the spatial spin texture in a semiconductor quantum well. The electron spin texture, which is a circular pattern with repeating spin-up and spin-down states whose repetition rate is determined by the topological charge, is directly excited by a vector vortex beam with a spatial helicity structure. The generated spin texture efficiently evolves into a helical spin wave pattern owing to the spin-orbit effective magnetic fields in the persistent spin helix state by controlling the spatial wave number of the excited spin mode. By tuning the repetition length and azimuthal angle, we simultaneously generate helical spin waves with opposite phases by a single beam.
