Perturbation of V-point polarization singular vector beams

Arora, Gauri; Joshi, Stuti; Singh, Hanuman; Haridas, V.; Senthilkumaran, P.

doi:10.1016/j.optlastec.2022.108842

Cited by 6 publications

(3 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Here, we will give examples of optical skyrmions generated using split-vortex beams and show how the skyrmion number and its topology is related to the OAM of the constituent beam. It is known that the coherent mixture of an LG 1 0 mode with a Gaussian beam can displace the location of the phase vortex singularity from the centre of the beam, 22,23 as is shown in Figure 3(a). Due to the non rotationally symmetric intensity distributions of these beams, they have been used to observe the mechanical rotational motion of beams carrying OAM about their propagation axis.…”

Section: Generation Of Tunable Optical Multi-skyrmionsmentioning

confidence: 99%

“…Additionally, we will present an alternative way to generate optical skyrmions using OAM beams with split vortices. [22][23][24] These beams provide an additional freedom in the polarisation texture of the skyrmion, by control of the location of the polarisation singulatities, and are reminiscent of the multi-skyrmions that have been created using rational maps. 18…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A topological approach for characterising optical skyrmions

McWilliam,

Cisowski,

et al. 2024

Complex Light and Optical Forces XVIII

View full text Add to dashboard Cite

Skyrmions are topologically protected field configurations characterised by a topological index, the skyrmion number. Optical skyrmions are ideally suited to investigate topological structures due to the ease of generating arbitrary light fields, and the freedom from energy constraints encountered by, for example, magnetic skyrmions. Building on our previous work of a topologically defined skyrmion number, 1 here we demonstrate the conservation of the skyrmion number of hedgehog skyrmions and bimerons under propagation. We furthermore generate tunable multi-skyrmions from superpositions of oppositely polarised Gaussian and split-vortex beams of different waists, and find that the skyrmion number is conserved as a function of waist scaling. For both cases, the topological definition of the skyrmion number forms an intuitive geometric approach to understanding the underlying topology and to identifying the individual skyrmion structures.

show abstract

Section: Generation Of Tunable Optical Multi-skyrmionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A topological approach for characterising optical skyrmions

McWilliam,

Cisowski,

et al. 2024

Complex Light and Optical Forces XVIII

View full text Add to dashboard Cite

show abstract

“…2(a, b)). Indeed, perturbation of vector field polarization singularities can occur when scalar linearly polarized beams are interfered [63].…”

Section: In Situ Higher-order Cavity Mode Tuningmentioning

confidence: 99%

Manipulation of polarization topology using a Fabry-Pérot fiber cavity with a higher-order mode optical nanofiber

Maeda¹,

Keloth²,

Chormaic³

2023

Preprint

View full text Add to dashboard Cite

Optical nanofiber cavity research has mainly focused on the fundamental mode. Here, a Fabry-Pérot fiber cavity with an optical nanofiber supporting the higher-order modes, TE 01 , TM 01 , HE 𝑜 21 , and HE 𝑒 21 , is demonstrated. Using cavity spectroscopy, with mode imaging and analysis, we observe cavity resonances that exhibit complex, inhomogeneous states of polarization with topological features containing Stokes singularities such as C-points, Poincaré vortices, and L-lines. In situ tuning of the intracavity birefringence enables the desired profile and polarization of the cavity mode to be obtained. These findings open new research possibilities for cold atom manipulation and multimode cavity quantum electrodynamics using the evanescent fields of higher-order mode optical nanofibers.

show abstract