ORBITAL ANGULAR MOMENTUM ORTHOGONALITY BASED CROSSTALK REDUCTION

Hybrid coding method of multiple orbital angular momentum states based on the inherent orthogonality.

We put forward a hybrid coding method of multiple orbital angular momentum (OAM) states based on the inherent orthogonality. Theoretical analysis shows this new coding method can tremendously improve the coding efficiency compared to the conventional way, and the OAM mode can be extended to all the transverse orthographic modes such as Bessel beams or Laguerre-Gauss modes. We also present a typ...

Optical orbital angular momentum.

We present a brief introduction to the orbital angular momentum of light, the subject of our theme issue and, in particular, to the developments in the 13 years following the founding paper by Allen et al. (Allen et al. 1992 Phys. Rev. A 45, 8185 (doi:10.1103/PhysRevA.45.8185)). The papers by our invited authors serve to bring the field up to date and suggest where developments may take us next...

Super-resolution orbital angular momentum based radar targets detection

Photon Orbital Angular Momentum in Astrophysics

Astronomical observations of the orbital angular momentum of photons, a property of electromagnetic radiation that has come to the fore in recent years, have apparently never been attempted. Here, I show how measurements of this property of photons have a number of astrophysical applications. Subject headings: Instrumentation: Miscellaneous – Masers – ISM: General – Extraterrestrial Intelligenc...

Quantum Formulation of Fractional Orbital Angular Momentum

The quantum theory of rotation angles (S. M. Barnett and D. T. Pegg, Phys. Rev. A, 41, 3427-3425 (1990)) is generalised to noninteger values of the orbital angular momentum. This requires the introduction of an additional parameter, the orientation of a phase discontinuity associated with fractional values of the orbital angular momentum. We apply our formalism to the propagation of light modes...