Comments on "Geometric Phase Associated with Transformations of Optical Beams Bearing Orbital Angular Momentum"

Comment on "Optical orbital angular momentum from the curl of polarization"

Comment on X.-L. Wang et al., Phys. Rev. Lett. 105, 253602 (2010).

Comment on "Poynting vector, orbital and spin momentum and angular momentum versus optical force and torque on arbitrary particle in generic optical fields"

We criticize the originality or correctness of some of the ideas and results recently reported by Ng et al. in arXiv:1511.08546.

评《时空光学涡旋（STOV）脉冲的模式结构与轨道角动量》

Comment on "Mode Structure and Orbital Angular Momentum of Spatiotemporal Optical Vortex (STOV) Pulses"

本文指出一篇STOV脉冲横向OAM研究论文存在数学错误与概念误读，澄清其计算结果仅为内禀贡献，且所用算符非厄米。

Comment on `Simulating thick atmospheric turbulence in the lab with application to orbital angular momentum communication'

Recently, Rodenburg et al (2014 New J. Phys. 16 033020) presented an approach for simulating propagation over a long path of uniformly distributed Kolmogorov-spectrum turbulence by means of a compact laboratory arrangement that used two carefully placed and controlled spatial light modulators. We show that their simulation approach mimics the behavior of plane-wave propagation, rather than general beam-wave propagation. Thus, the regime in which their orbital angular momentum (OAM) cross-talk results accurately represent the behavior to be expected in horizontal-path propagation through turbul…

Comment on "Comment on 'Spin-Momentum-Locked Edge Mode for Topological Vortex Lasing, Phys. Rev. Lett. vol. 125, 013903 (2020)'"

In our Letter (Phys. Rev. Lett. vol. 125, 013903 (2020)), we reported topological vortex lasers based on spin-momentum-locked edge modes. We observed that the near field spin and orbital angular momentum has a one-to-one far-field radiation correspondence of circular polarization and orbital angular momentum respectively. Sun et al. in their Comment (arXiv:2009.04700v1), however, argued that we did not perform numerical simulations on the near field information of our experimentally studied topological edge modes, and our mode assignment was mistaken and spoiled the one-to-one correspondence. …

Mapping of focused Laguerre-Gauss beams: The interplay between spin and orbital angular momentum and its dependence on detector characteristics

We show that propagating optical fields bearing an axial symmetry are not truly hollow in spite of a null electric field on-axis. The result, obtained by general arguments based upon the vectorial nature of electromagnetic fields, is of particular significance in the situation of an extreme focusing, when the paraxial approximation no longer holds. The rapid spatial variations of fields with a "complicated" spatial structure are extensively analyzed in the general case and for a Laguerre-Gauss beam 2 as well, notably for beams bearing a |l| = 2 orbital angular momentum for which a magnetic fie…