Conversion of a basis-dependent superposition of orbital-angular-momentum states using a<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>q</mml:mi></mml:math>plate

Bansal, Sarvesh; Pal, Sushanta Kumar; Senthilkumaran, P.

doi:10.1103/physreva.104.033503

Cited by 2 publications

(2 citation statements)

References 57 publications

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“…In a standard Poincaré sphere χ represents the ellipticity and γ represents the azimuth of the polarization. In both HOPS and HyOPS, γ represents Pancharatnam phase [20] while χ represents ellipticity in HOPS and Stoke's ring size in HyOPS [10]. Comparison among PS, HOPS, and HyOPS is given in table 1.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

“…This article deals with the Poincaré beams [6,7] that are represented by such HyOPS. Articles on generation [4,5,[8][9][10], characterization [11], dynamic modulation [12] and applications [13][14][15][16] of HyOPS appear from time to time. Although the introduction of new topological constructs of HyOPS and much of its potential are actively explored, till date there is no direct method of finding the coordinates of the beam on these spheres by direct intensity measurement.…”

Section: Introductionmentioning

confidence: 99%

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Experimental determination of Poincaré beam coordinates on a Hybrid order Poincaré sphere

Bansal,

Senthilkumaran

2023

Phys. Scr.

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Hybrid order Poincaré sphere (HyOPS) is used to represent Poincaré beams as points on it. The latitude and longitude of the HyOPS represent the size of the Stokes vortex ring and Pancharatnam phase of the Poincaré beam respectively. Although the HyOPS was introduced in 2015, there is no method that allows one to unambiguously determine the coordinates of Poincaré beams on this sphere. In this article, by subjecting the Poincaré beams to angular momentum and polarization transformations using conventional phase and polarizing elements respectively, we demonstrate an experimental method to determine the coordinates of the Poincaré beams on the HyOPS. This method may enable one to study the chirality and circular dichroism in materials and to enable us to segregate them, where both phenomena occur simultaneously.

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Section: Theoretical Backgroundmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental determination of Poincaré beam coordinates on a Hybrid order Poincaré sphere

Bansal,

Senthilkumaran

2023

Phys. Scr.

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Generation of Stokes singularities using polarization lateral shear interferometer

Arora¹,

Senthilkumaran²

2022

Opt. Express

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Lateral shear interferometer, being a self-referenced interferometer, has proven to be an important tool in scalar optics. Here we employ a vectorial counterpart - polarization lateral shear interferometer, in which the two interfering beams apart from being derived from the test wavefront, are in orthogonal states of polarization. Therefore when the test wavefront has spatially varying phase gradient across the beam cross-section, the resulting shearogram produces polarization fringes instead of intensity fringes. Further, the shearogram becomes inhomogeneously polarized. This polarization lateral shear interferometer may have potential uses in metrology, but in this article we demonstrate the ability of the interferometer in the generation of all Stokes singularities in the single beam by launching a phase singular beam into it. It is found that a vortex dipole is formed along with other generic Stokes singularities. Experimental observations support the results and they are discussed in the article.

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Conversion of a basis-dependent superposition of orbital-angular-momentum states using aqplate

Cited by 2 publications

References 57 publications

Experimental determination of Poincaré beam coordinates on a Hybrid order Poincaré sphere

Experimental determination of Poincaré beam coordinates on a Hybrid order Poincaré sphere

Generation of Stokes singularities using polarization lateral shear interferometer

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