Vector vortex beam generation with dolphin-shaped cell meta-surface

Yang, Zhuo; Kuang, Dengfeng; Cheng, Fang

doi:10.1364/oe.25.022780

Cited by 7 publications

(5 citation statements)

References 30 publications

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“…Intracavity methods can be employed for generation of only V-points and not for C-points. Generation of radially polarized beams can also be achieved by conical diffraction [484], spatially varying subwavelength grating structures [485][486][487] and diffractive optical elements [488].…”

Section: Literature Survey Of Phase and Polarization Singularitiesmentioning

confidence: 99%

Phase Singularities to Polarization Singularities

Ruchi

Senthilkumaran

Pal

2020

International Journal of Optics

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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.

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Section: Literature Survey Of Phase and Polarization Singularitiesmentioning

confidence: 99%

Phase Singularities to Polarization Singularities

Ruchi

Senthilkumaran

Pal

2020

International Journal of Optics

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“…They used gold nanorods to design a reflection-based metasurface for vortex generation at 697 nm. Similar works on plasmonic metasurfaces' use in vortex beam generation include [11][12][13][14]. In contrast with the discussed approaches, optical vortex beams have also been demonstrated through the use of dielectrics, which promise a higher efficiency.…”

Section: Introductionmentioning

confidence: 99%

Ultraviolet Vortex Generation Through All-Dielectric Nano-Antennas for Free Space Optical Communication

Asim¹

2021

PIER Letters

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Metamaterials have revolutionized the research in conventional electromagnetics. They display unique properties which can be used for the manipulation of electromagnetic waves in unexpected ways. In this research, a diamond nano-antenna is designed and optimized using the CST Microwave Studio, which uses Finite Difference Time Domain (FDTD) method. The designed unit cell shows high polarization conversion rates (PCR) for ultraviolet (UV) frequencies (especially the UV-B band) whilst covering Panchatram-Berry (PB) phase. The unit cell is then used to design metasurfaces that generate light beams carrying Orbital Angular Momentum (OAM) of different orders. Through the design of two dimensional metamaterial surfaces, the behavior of electromagnetic beams can be changed on subwavelength scale. This has led to a number of applications related to nanotechnology. A vortex beam carries Orbital Angular Momentum (OAM) which has played a vital role in increasing the bandwidth and data rate of optical communication systems. Therefore, OAM beams having different topological charges have been generated at 294 nm to propose an improvement in Free Space Optical (FSO) communication. Optical links also function as a suitable substitute for applications where Radio Frequency (RF) communications may not be effective. The proposed theoretical model is expected to open new horizons in optical communication by incorporating the use of nanoscale devices with high efficiencies in the ultraviolet regime.

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“…In recent years, combinations of spirals and tapers were proposed for generation of localized vortex beams [6,33,34,35]. In addition, designed artificial structures were reported to convert linearly polarized beams into localized vector vortex beams [35,36]. In other words, it was good for nano-miniaturization and integration of optical elements that localized vector vortex beams can be generated without extra polarizers.…”

Section: Introductionmentioning

confidence: 99%

“…In other words, it was good for nano-miniaturization and integration of optical elements that localized vector vortex beams can be generated without extra polarizers. Nevertheless, the proportion of the longitudinal component and the localization of transmitted fields generated by meta-surfaces above is not high enough in theory (<20%) [36], resulting in low-sensitivity and low-precision of particle manipulation, respectively. Besides, most vortex beam generators work only at several certain frequencies [28,29,35].…”

Section: Introductionmentioning

confidence: 99%

Visible-broadband Localized Vector Vortex Beam Generator with a Multi-structure-composited Meta-surface

Yang

Kuang

2019

Nanomaterials

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We demonstrate a vortex beam generator meta-surface that consists of silver structures and graphene layers. The miniature material is just a few microns in size and the working part is only a few hundred nanometers thick. With the incidence of the linearly polarized beam, the meta-surface generates high-localized vector vortex beam with a high proportion of the longitudinal component. Being compared with the constituent part of the meta-surface, the multi-structure-combined meta-surface increases the localization by 250% and the longitudinal component proportion by 200%. Moreover, the above artificial material can generate vortex beams in broadband within the visible light range. These novel optical properties have the potential to improve the precision and sensitivity of nanoparticle manipulation. The study serves as a foundation in optical miniaturization and integration, nanoparticle manipulation, high-efficiency optical and quantum communication, and light-driven micro-tools.

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Vector vortex beam generation with dolphin-shaped cell meta-surface

Cited by 7 publications

References 30 publications

Phase Singularities to Polarization Singularities

Phase Singularities to Polarization Singularities

Ultraviolet Vortex Generation Through All-Dielectric Nano-Antennas for Free Space Optical Communication

Visible-broadband Localized Vector Vortex Beam Generator with a Multi-structure-composited Meta-surface

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