Optical spin-to-orbital angular momentum conversion in inhomogeneous anisotropic media
Optical spin-to-orbital angular momentum conversion in inhomogeneous anisotropic media
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DOI：
10.1103/physrevlett.96.163905
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发表时间：
2006-04-28
影响因子：
8.6
通讯作者：
Paparo, D
中科院分区：
文献类型：
--
作者：
Marrucci, L;Manzo, C;Paparo, D
我们实验证明了一个光学过程中，由圆偏振光携带的自旋角动量转换成轨道角动量，导致产生的螺旋模式与波前螺旋度控制的输入偏振。这种现象需要光与光学不均匀和各向异性的物质相互作用。基本的物理学也与所谓的Pancharatnam-Berry几何相位有关，这些相位涉及光学偏振的任何非均匀变换。
We demonstrate experimentally an optical process in which the spin angular momentum carried by a circularly polarized light beam is converted into orbital angular momentum, leading to the generation of helical modes with a wave-front helicity controlled by the input polarization. This phenomenon requires the interaction of light with matter that is both optically inhomogeneous and anisotropic. The underlying physics is also associated with the so-called Pancharatnam-Berry geometrical phases involved in any inhomogeneous transformation of the optical polarization.