Abstract

We demonstrate theoretically and experimentally coherence-induced depolarization effects in generic and higher index polarization singular beams endowed with C-point (or V-point) polarization singularity. The irradiance profiles and degree of polarization (DoP) distributions are found to be governed by spatial coherence length, polarization singularity index, and orbital angular momentum (OAM) of the superposition states of the beams. On reducing the coherence length, the DoP distribution in the V-point deteriorates uniformly. In contrast, C-point beams resist depolarization exhibiting anti-depolarization around the central core of the beam due to the nonzero net OAM of the beam. Interestingly, the polarization vortex structure remains preserved on reducing the spatial coherence length.

© 2022 Optica Publishing Group

Coherence-induced polarization effects in vector vortex beams

Stuti Joshi, Saba N. Khan, Manisha, P. Senthilkumaran, and Bhaskar Kanseri
Opt. Lett. 45(17) 4815-4818 (2020)

Evolution of coherence singularities in polarization singular beams

Stuti Joshi, Saba N. Khan, and P. Senthilkumaran
Appl. Opt. 63(1) 49-55 (2024)

Singular-value decomposition and electromagnetic coherence of optical beams

Meilan Luo, Jyrki Laatikainen, Ari T. Friberg, Olga Korotkova, and Tero Setälä
Opt. Lett. 47(20) 5337-5340 (2022)

Magnetic modulation of topological polarization singularities in momentum space

Chen Zhao, Shaohua Dong, Qing Zhang, Yixuan Zeng, Guangwei Hu, and Yongzhe Zhang
Opt. Lett. 47(11) 2754-2757 (2022)

Generalization of Malus’ law and spatial coherence relations for linear polarizers and non-uniform polarizers

Jia Xu, Greg Gbur, and Taco D. Visser
Opt. Lett. 47(21) 5739-5742 (2022)