光束偏振和传播路径对本征结构的联合影响
Joint effect of polarization and the propagation path of a light beam on its intrinsic structure
摘要：
众所周知的光的自旋-轨道相互作用效应是光的三种角动量（即自旋角动量、外生轨道角动量和内生轨道角动量）对相互影响的表现。本文提出了光的自旋-轨道相互作用效应的简便分类，并在此分类的框架内观察到一种新的效应，它是由两种角动量对第三种角动量的共同影响决定的，即自旋角动量和外生轨道角动量对内禀轨道角动量的影响。实验研究了圆偏振光在螺旋光纤中的传输。我们发现，自旋角动量和螺旋参数影响通过光纤传输的辐射的空间结构。我们发现，改变圆偏振态的符号，光场的结构发生旋转。旋转角度取决于螺旋线的参数。研究结果可用于发展自旋粒子的一般理论，并可在计量方法和纳米光学器件中找到应用。
英文摘要：
The well-known effects of the spin-orbit interaction of light are manifestations of pair mutual influence of the three types of the angular momentum of light, namely, the spin angular momentum, the extrinsic orbital angular momentum and the intrinsic orbital angular momentum. Here we propose the convenient classification of the effects of the spin-orbit interaction of light and we observe one of the new effects in the frame of this classification, which is determined by the joint influence of two types of the angular momentum on the third type of the angular momentum, namely, the influence of the spin angular momentum and the extrinsic orbital angular momentum on the intrinsic orbital angular momentum. We experimentally studied the propagation of circularly polarized light through an optical fiber coiled into a helix. We have found that the spin angular momentum and the helix parameters affect the spatial structure of the radiation transmitted through the optical fiber. We found out that the structure of the light field rotates when changing the sign of circular polarization. The angle of rotation depends on the parameters of the helix. The results can be used to develop the general theory of spinning particles and can find application in metrology methods and nanooptics devices.
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