Optical angular momentum derivation and evolution from vector field superposition.

  title={Optical angular momentum derivation and evolution from vector field superposition.},
  author={Liang Fang and Jian Wang},
  journal={Optics express},
  volume={25 19},
Optical intrinsic angular momentum can be regarded as derivation from spatial superposition of optical vector fields embodied by spinning or/and spiraling the electric-field vector. We employ vectorial formulation derivation to comprehensively study all angular momentum contents of optical vector fields in arbitrary superposition states, including the longitudinal and transverse, spin and orbital (SAM and OAM) components. As for the orthogonal superposition fields, there inherently exists spin… 

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