Light Beams with Spatially Variable Polarization

Galvez, Enrique J.

doi:10.1002/9781119009719.ch3

Cited by 30 publications

(31 citation statements)

References 69 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Beyond that, spatial modulation of polarization states becomes more and more important (see sections 7 and8) [59]. While primarily interferometric methods and so-called q-plates allow thegeneration of radially and azimuthally polarized beams, liquid crystal SLMs havepioneered therealization of extended Poincaré beams.…”

Section: Statusmentioning

confidence: 99%

Roadmap on structured light

Rubinsztein‐Dunlop

Forbes

Berry

et al. 2016

J. Opt.

1,131

630

View full text Add to dashboard Cite

Structured light refers to the generation and application of custom light fields. As the tools and technology to create and detect structured light have evolved, steadily the applications have begun to emerge. This roadmap touches on the key fields within structured light from the perspective of experts in those areas, providing insight into the current state and the challenges their respective fields face. Collectively the roadmap outlines the venerable nature of structured light research and the exciting prospects for the future that are yet to be realized.

show abstract

Section: Statusmentioning

confidence: 99%

Roadmap on structured light

Rubinsztein‐Dunlop

Forbes

Berry

et al. 2016

J. Opt.

1,131

630

View full text Add to dashboard Cite

show abstract

“…Several methods have been proposed and carried out to experimentally synthesize different types of NUP beams. They use Mach-Zehnder interferometers (MZIs), fiber lasers running in either CW or pulsed mode, digital lasers, spatial light modulators (SLMs), metasurfaces, stressed optical windows, q-plates, spiral phase plates, photoaligned liquid crystals, digital micromirrors, and more (see, e.g., [6,23,25,28,33,46,52,57,61,66,69,[92][93][94][95]). In this tutorial, we will describe some techniques to generate NUTP beams that could be implemented with conventional optical systems and do not require sophisticated optical equipment, such as SLMs, or complex configurations, such as modifications of a laser cavity, and so on.…”

Section: Synthesizing Nutp Beamsmentioning

confidence: 99%

“…Polarization of light is an exciting subject, and numerous books and research articles have been devoted to understanding and modeling this characteristic of light, even in very recent times [1][2][3][4][5][6][7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of non-uniformly totally polarized light beams: tutorial

Piquero¹,

Martı́nez-Herrero²,

Sande³

et al. 2020

J. Opt. Soc. Am. A

View full text Add to dashboard Cite

Polarization of a light beam is traditionally studied under the hypothesis that the state of polarization is uniform across the transverse section of the beam. In such a case, if the paraxial approximation is also assumed, the propagation of the beam reduces to a scalar problem. Over the last few decades, light beams with spatially variant states of polarization have attracted great attention, due mainly to their potential use in applications such as optical trapping, laser machining, nanoscale imaging, polarimetry, etc. In this tutorial, an introductory treatment of nonuniformly totally polarized beams is given. Besides a brief review of some useful parameters for characterizing the polarization distribution of such beams across transverse planes, from both local and global points of view, several methods for generating them are described. It is expected that this tutorial will serve newcomers as a starting point for further studies on the subject.

show abstract

“…Spin-orbit beams are beams embedded with polarization singularities 3 – 6 and can be described as a superposition of orthogonal OAM states in orthogonal spin angular momentum (SAM) states. In recent years, beams with single polarization singularity at the center of the beam are called by special names such as Poincaré beams 7 , cylindrical vector beams 8 , vector vortex beams 9 , Majorana beams 10 . Here, we deal with higher order Poincaré sphere (HOPS) beams 11 – 13 and hybrid order Poincaré sphere beams (HyOPS) 14 – 17 that contain a polarization singularity at the center of the beam and only two dimensional field distributions are considered.…”

Section: Introductionmentioning

confidence: 99%

Detection of degenerate Stokes index states

Arora

Deepa

Khan

et al. 2020

Sci Rep

View full text Add to dashboard Cite

Stokes phase is the phase difference between orthogonal component states in the decomposition of any polarization state. Phase singularities in the Stokes phase distribution are Stokes singularities of an inhomogeneous polarization distribution. Under circular decomposition, Stokes phase distribution $$(\phi _{12})$$ ( ϕ 12 ) represents polarization azimuth $$(\gamma )$$ ( γ ) distribution and the singularities present in it are polarization singularities. Therefore, the charge of the Stokes vortices depicted as Stokes index $$\sigma _{12}$$ σ 12 is an important parameter associated with the polarization singularity. The Hybrid order Poincaré sphere (HyOPS)/Higher order Poincaré sphere (HOPS) beams, all having same Stokes index, contain a Stokes singularity at the center of the beam as these beams are constructed by vortex superposition. These beams, being superposition of orthogonal orbital angular momentum (OAM) states in orthogonal spin angular momentum (SAM) states can offer great multiplexing capabilities in communication. In this article, we identify these degenerate Stokes index states and discuss the ways and means of lifting this degeneracy. Otherwise, there are limitations on intensity based detection techniques, where demultiplexing or segregation of different HOPS/HyOPS beams is warranted. The method adduced here uses the diffraction of these beams through an equilateral triangular aperture in combination with polarization transformation as a probe to lift the Stokes index/Stokes phase degeneracy. Successively, the novelty of the detection scheme is discussed in the context of beams with alike polarization distributions where even the technique of Stokes polarimetry fails to predict the OAM and SAM content of the beam.

show abstract

Light Beams with Spatially Variable Polarization

Cited by 30 publications

References 69 publications

Roadmap on structured light

Roadmap on structured light

Synthesis and characterization of non-uniformly totally polarized light beams: tutorial

Detection of degenerate Stokes index states

Contact Info

Product

Resources

About