Radial phase modulated spiral zone plate for generation and manipulation of optical perfect vortex

Sabatyan, Arash; Behjat, Zahra

doi:10.1007/s11082-017-1211-4

Cited by 25 publications

(12 citation statements)

References 36 publications

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“…It is this aspect which we aim to quantify here. In the literature, many PV experiments consider topological charges in a small enough range where the increase is unnoticeable/negligible (for example [7]). Others have given a semi-empirical rule for the increasing radius (for example [6]) and some have numerically calculated the OAM-dependent width for the PVs they generate (for example [8]).…”

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confidence: 99%

How perfect are perfect vortex beams?

2019

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Perfect (optical) vortex (PV) beams are fields which are mooted to be independent of the orbital angular momentum (OAM) they carry. To date, the best experimental approximation of these modes is obtained from passing Bessel-Gaussian beams through a Fourier lens. However, the OAMdependent width of these quasi-PVs is not precisely known and is often understated. We address this here by deriving and experimentally confirming an explicit analytic expression for the second moment width of quasi-PVs. We show that the width scales in proportion to √ in the best case, the same as most "regular" vortex modes albeit with a much smaller proportionality constant. Our work will be of interest to the large community who seek to use such structured light fields in various applications, including optical trapping, tweezing and communications.

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confidence: 99%

How perfect are perfect vortex beams?

2019

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“…As is well known [64], if some recording medium carries the pattern of interference between an arbitrary "object" beam and a standard "reference" beam, then, after illuminating this structure with a more or less accurate copy of the reference beam, the object beam structure can be restored in the diffracted field. In application to OV, this approach was first realized even before the "singular" era [18] and obtained further development, with many modifications and technical improvements, in a lot of subsequent works [38,53,60,[65][66][67][68]. The necessary interference pattern, based on the desired OV-beam structure, can be calculated and afterwards reproduced in the optical transparency or, more flexibly, with the programmable spatial light modulator [39][40][41][42].…”

Section: Interference Properties and Generation Of Optical Vorticesmentioning

confidence: 99%

Opto-Electronics Review

Angelsky,

Bekshaev,

Mokhun

et al. 2022

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The review exposes basic concepts and manifestations of the singular and structured light fields. The presentation is based on deep intrinsic relations between the singularities and the rotational phenomena in light; it involves essentially the dynamical aspects of light fields and their interactions with matter. Due to their topological nature, the singularities of each separate parameter (phase, polarization, energy flow, etc.) form coherent interrelated systems (singular networks), and the meaningful interconnections between the different singular networks are analysed. The main features of singular-light structures are introduced via generic examples of the optical vortex and circular vortex beams. The review describes approaches for generation and diagnostics of different singular networks and underlines the role of singularities in formation of optical field structures. The mechanical action of structured light fields on material objects is discussed on the base of the spin-orbital (canonical) decomposition of electromagnetic momentum, expressing the special roles of the spin (polarization) and spatial degrees of freedom. Experimental demonstrations spectacularly characterize the topological nature and the immanent rotational features of the light-field singularities. The review is based on the results obtained by its authors with a special attention to relevant works of other researchers.

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“…This same principle has been used to generate a variety of exotic complex light with OAM, such as Mathieu beams, 84 achromatic vortices, 85 modulated optical vortices, 86 optical-vortex filaments, 63 spiraling higher-order Bessel beams, 87 beams with fractional topological charges, 88,89 and perfect vortex beam. 90,91 The disadvantages of employing an HOE for the generation of special beams carrying OAM, such as lower efficiency, are discussed in Ref. 7 and the references therein.…”

Section: Generation Using Holographic Optical Elementsmentioning

confidence: 99%

Generation and decomposition of scalar and vector modes carrying orbital angular momentum: a review

et al. 2019

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Orbital angular momentum (OAM), one of the most recently discovered degrees of freedom of light beam field has fundamentally revolutionized optical physics and its technological capabilities. Optical beams with OAM have enabled a large variety of applications, including super-resolution imaging, optical trapping, classical and quantum optical communication, and quantum computing, to mention a few. To enable these and several other emerging applications, optical beams with OAM have been generated using a variety of methods and technologies, such as a simple astigmatic lens pair, one-/two-dimensional holographic optical elements, threedimensional spiral phase plates, optical fibers, and recent entrants such as metasurfaces. All these techniques achieve spatial light modulation and can be implemented with either passive elements or active devices, such as liquid crystal on silicon and digital micromirror devices. Many of these devices and technologies are not only used for the generation of amplitude phase-polarization structured light beams but are also capable of analyzing them. We have attempted to encompass a wide variety of such technologies as well as a few emerging methodologies, broadly categorized into generation and detection protocols. We address the needs of scientists and engineers who desire to generate/detect OAM modes and are looking for the technique (active or passive) best suited for their application. © The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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Radial phase modulated spiral zone plate for generation and manipulation of optical perfect vortex

Cited by 25 publications

References 36 publications

How perfect are perfect vortex beams?

How perfect are perfect vortex beams?

Opto-Electronics Review

Generation and decomposition of scalar and vector modes carrying orbital angular momentum: a review

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