Imprinting Spatial Helicity Structure of Vector Vortex Beam on Spin Texture in Semiconductors
Imprinting Spatial Helicity Structure of Vector Vortex Beam on Spin Texture in Semiconductors
复制标题
在半导体自旋织构上刻印矢量涡旋光束的空间螺旋结构
DOI：
10.1103/physrevlett.130.126701
复制
发表时间：
2023
影响因子：
8.6
通讯作者：
Miyajima Kensuke
中科院分区：
文献类型：
--
作者：
Ishihara Jun;Mori Takachika;Suzuki Takuya;Sato Sota;Morita Ken;Kohda Makoto;Ohno Yuzo;Miyajima Kensuke
我们提出了在半导体量子阱中，拓扑结构光的空间变化偏振态到空间自旋织构的转移。电子自旋织构是一种由拓扑荷决定重复率的自旋上、自旋下重复态的圆形图案，由具有空间螺旋度结构的矢量涡旋束直接激发。通过控制激发自旋模式的空间波数，由于持续自旋螺旋状态下的自旋轨道有效磁场，所产生的自旋织构有效地演变成螺旋自旋波图案。通过调节光束的重复长度和方位角，我们用一束光同时产生了相位相反的螺旋自旋波。
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.