Optical angular momentum derivation and evolution from vector field superposition.

@article{Fang2017OpticalAM,
  title={Optical angular momentum derivation and evolution from vector field superposition.},
  author={Liang Fang and Jian Wang},
  journal={Optics express},
  year={2017},
  volume={25 19},
  pages={
          23364-23375
        }
}
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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References

SHOWING 1-10 OF 77 REFERENCES

Transverse and longitudinal angular momenta of light

Spin and orbital angular momentum of a class of nonparaxial light beams having a globally defined polarization

It is shown that the momentum density of free electromagnetic field splits into two parts. One has no contribution to the net momentum due to the transversality condition. The other yields all the

Orbital angular momentum: origins, behavior and applications

As they travel through space, some light beams rotate. Such light beams have angular momentum. There are two particularly important ways in which a light beam can rotate: if every polarization vector

Extraordinary momentum and spin in evanescent waves.

It is demonstrated that the transverse momentum and spin push and twist a probe Mie particle in an evanescent field allows the observation of 'impossible' properties of light and of a fundamental field-theory quantity, which was previously considered as 'virtual'.

Angular momentum dynamics of a paraxial beam in a uniaxial crystal.

The conservation law governing the dynamics of the radiation angular momentum component along the optical axis (z axis) of a uniaxial crystal is derived from Maxwell's equations and it is found that the expression is the same as the corresponding one for a paraxial beam propagating in an isotropic medium of refractive index n(o).

Universal spin-momentum locked optical forces

Evanescent electromagnetic waves possess spin-momentum locking, where the direction of propagation (momentum) is locked to the inherent polarization of the wave (transverse spin). We study the

Higher-order Poincaré sphere, stokes parameters, and the angular momentum of light.

A higher-order Poincaré sphere and Stokes parameter representation of the higher-order states of polarization of vector vortex beams that includes radial and azimuthal polarized cylindrical vector

Intrinsic transverse spin angular momentum of fiber eigenmodes

We study the transverse spin angular momentum of fiber eigenmodes. As an intrinsic property of fiber eigenmodes, it becomes considerable in optical nanofibers and, especially, increases sharply in

Spin-to-orbital angular momentum conversion in focusing, scattering, and imaging systems.

A general theory of spin-to-orbital angular momentum conversion of light in focusing, scattering, and imaging optical systems is presented and allows for direct calculation and comparison of the AM conversion efficiency in different physical settings.

Angular Momenta and Spin-Orbit Interaction of Nonparaxial Light in Free Space

We give an exact self-consistent operator description of the spin and orbital angular momenta, position, and spin-orbit interactions of nonparaxial light in free space. Both quantum-operator
...