光的自旋与内禀轨道角动量相互作用的观测

Observation of Interaction of Spin and Intrinsic Orbital Angular Momentum of Light.

作者信息

Vitullo Dashiell L P, Leary Cody C, Gregg Patrick, Smith Roger A, Reddy Dileep V, Ramachandran Siddharth, Raymer Michael G

机构信息

Department of Physics and Oregon Center for Optical, Molecular, and Quantum Science, University of Oregon, Eugene, Oregon 97403, USA.

Department of Physics, College of Wooster, Wooster, Ohio 44691, USA.

出版信息

Phys Rev Lett. 2017 Feb 24;118(8):083601. doi: 10.1103/PhysRevLett.118.083601. Epub 2017 Feb 21.

DOI:10.1103/PhysRevLett.118.083601

PMID:28282159

Abstract

The interaction of spin and intrinsic orbital angular momentum of light is observed, as evidenced by length-dependent rotations of both spatial patterns and optical polarization in a cylindrically symmetric isotropic optical fiber. Such rotations occur in a straight few-mode fiber when superpositions of two modes with parallel and antiparallel orientation of spin and intrinsic orbital angular momentum (IOAM=2ℏ) are excited, resulting from a degeneracy splitting of the propagation constants of the modes.

摘要

观察到了光的自旋与内禀轨道角动量之间的相互作用，这在圆柱对称各向同性光纤中空间模式和光偏振的长度依赖性旋转中得到了证明。当具有平行和反平行自旋与内禀轨道角动量取向（内禀轨道角动量(IOAM = 2\hbar)）的两个模式的叠加被激发时，这种旋转会在直的少模光纤中发生，这是由模式传播常数的简并分裂导致的。