Singularities in cylindrical vector beams

Verma, Manish; Pal, Sushanta Kumar; Joshi, Stuti; Senthilkumaran, P.; Joseph, Joby; Kandpal, H.C.

doi:10.1080/09500340.2015.1019384

Cited by 15 publications

(4 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The spatial information appears in the form of spatially varying polarization distribution, making this field a potentially rewarding area of research. For example, even though a V-point singularity has a plane wavefront, the circular polarization basis decomposition shows that it is tantamount to be made of two opposite helical wavefronts 15,26 . When the vectorial nature of the beam is concerned, both phase and polarization can be coupled to modulate a light beam in a structured way.…”

Section: Angular Momentum Transfer By Diffraction Through a Fork Gratingmentioning

confidence: 99%

Helicity dependent diffraction by angular momentum transfer

Deepa

Senthilkumaran

2019

Sci Rep

Self Cite

View full text Add to dashboard Cite

In this article we show that diffraction segregates the polarization singularities according to their handedness. Polarization singularities are superpositions of left and right handed circular polarization vortex states. In the superposition, the component states possess different orbital angular momenta depending on the type of the singularity. A fork grating that can generate different orbital angular momentum (OAM) states in different diffraction orders is shown to segregate right and left handed polarization singularities. A V-point polarization singularity that corresponds to one combination of OAM states incident on the fork grating is found to diffract in such a way that the same OAM combination does not occur in all the nonzero diffraction orders. As a result, each of the diffraction orders will have different polarization singularities. This OAM transfer by the fork grating segregates the right and left handed polarization singularities thereby, making the diffraction helicity dependent.

show abstract

Section: Angular Momentum Transfer By Diffraction Through a Fork Gratingmentioning

confidence: 99%

Helicity dependent diffraction by angular momentum transfer

Deepa

Senthilkumaran

2019

Sci Rep

Self Cite

View full text Add to dashboard Cite

show abstract

“…Beams with slowly and spatially varying polarization distributions have attracted interest in recent years [8,9,[82][83][84][85][86][87][88][89]. Polarization singularities occur in inhomogeneously polarized light fields that have spatially varying polarization distribution.…”

Section: Polarization Singularitymentioning

confidence: 99%

“…ese beams can also be used for particle acceleration [561,562], trapping of metallic Rayleigh particles [563], optical manipulation [564], and optical signal processing [370,565,566]. Both point and edge phase dislocations are present in radial and azimuthal polarized beams [86] depending on which polarization component (either linear or circular) is extracted. Depolarization effects of laser beam propagation in turbulent atmosphere was studied [567,568].…”

Section: Literature Survey Of Phase and Polarization Singularitiesmentioning

confidence: 99%

Phase Singularities to Polarization Singularities

Ruchi

Senthilkumaran

Pal

2020

International Journal of Optics

Self Cite

View full text Add to dashboard Cite

Polarization singularities are superpositions of orbital angular momentum (OAM) states in orthogonal circular polarization basis. The intrinsic OAM of light beams arises due to the helical wavefronts of phase singularities. In phase singularities, circulating phase gradients and, in polarization singularities, circulating ϕ12 Stokes phase gradients are present. At the phase and polarization singularities, undefined quantities are the phase and ϕ12 Stokes phase, respectively. Conversion of circulating phase gradient into circulating Stokes phase gradient reveals the connection between phase (scalar) and polarization (vector) singularities. We demonstrate this by theoretically and experimentally generating polarization singularities using phase singularities. Furthermore, the relation between scalar fields and Stokes fields and the singularities in each of them is discussed. This paper is written as a tutorial-cum-review-type article keeping in mind the beginners and researchers in other areas, yet many of the concepts are given novel explanations by adopting different approaches from the available literature on this subject.

show abstract

“…The three Bessel light modes carry well defined orbital as well as spin angular momentum, they have been mentioned in several studies due to their attractive properties [4,5]. Extraction of any angular momentum parts of the light could be technically performed, singularity of cylindrical laser beams with different polarization is also investigated [6]. However, it would be worth the effort to provide a general formula of total angular momentum densities for these light modes at momentum states.…”

mentioning

confidence: 99%

Axial Angular Momentum of Bessel Light

Nairat¹

2018

Photon.Lett.PL

View full text Add to dashboard Cite

Both linear and angular momentum densities of Bessel, Gaussian-Bessel, and Hankel-Bessel lasers are determined. Angular momentum of the three Bessel beams is illustrated at linear and circular polarization. Axial Angular momentum is resolved in particular interpretation: the harmonic order of the physical light momentum. Full Text: PDF ReferencesG. Molina-Terriza, J. Torres, and L. Torner, "Twisted photons", Nature Physics 3, 305 - 310 (2007). CrossRef J Arlt, V Garces-Chavez, W Sibbett, and K Dholakia "Optical micromanipulation using a Bessel light beam", Opt. Commun., 197, 4-6, (2001). CrossRef L. Ambrosio and H. Hernández-Figueroa, "Gradient forces on double-negative particles in optical tweezers using Bessel beams in the ray optics regime", Opt Exp, 18, 23 (2010). CrossRef I. Litvin, A. Dudley and A. Forbes, "Poynting vector and orbital angular momentum density of superpositions of Bessel beams", Opt Exp, 19, 18 (2011). CrossRef K Volke-Sepulveda, V Garcés-Chávez, S Chávez-Cerda, J Arlt and K Dholakia "Orbital angular momentum of a high-order Bessel light beam" , JOP B 4 (2). 2002. CrossRef M. Verma, S. Pal, S. Joshi, P. Senthilkumaran, J. Joseph, and H Kandpal, "Singularities in cylindrical vector beams", Jou. of Mod. Opt., 62 (13), 2015. CrossRef R. Borghi, M. Santarsiero, and M. Porras, "Nonparaxial Bessel?Gauss beams", J. Opt. Soc. Am. A, 18 (7) (2011). CrossRef L. Allen, M. Beijersbergen, R. Spreeuw, and J. Woerdman, "Orbital angular momentum of light and the transformation of Laguerre-Gaussian Laser modes", Phys Rev A, 45 (11): 8185-8189 (1992). CrossRef D. Mcglion and K. Dholakia, "Bessel beams: diffraction in a new light", Cont. Phys, 46(1) 15 ? 28. (2005). CrossRef F. Gori, G. Guattari and C. Padovani," Bessel-Gauss Beams", Opt. Commun., 64, 491, (1987). CrossRef V. Kotlyar, A. Kovalev, and A. Soifer, "Hankel?Bessel laser beams" J. Opt. Soc. Am. A, 29 (5) (2012). CrossRef L. Allen and M. Babiker "Spin-orbit coupling in free-space Laguerre-Gaussian light beams", Phys. Rev. A 53, R2937. CrossRef

show abstract

Singularities in cylindrical vector beams

Cited by 15 publications

References 36 publications

Helicity dependent diffraction by angular momentum transfer

Helicity dependent diffraction by angular momentum transfer

Phase Singularities to Polarization Singularities

Axial Angular Momentum of Bessel Light

Contact Info

Product

Resources

About