Formation of vortices by interference of surface plasmon polaritons

Dzedolik, I. V.; Pereskokov, Vladislav

doi:10.1364/josaa.33.001004

Cited by 10 publications

(4 citation statements)

References 25 publications

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“…This demonstrates that the transmitted optical field can be decomposed into two orthogonal spin components: one part preserves the same spin with the incidence, and the other is converted to the reversed spin with an additional phase of 2σβ. For the SPP wave, the z-polarization electric field is considered a dominant field component, where dE spp at the field point can be described as [41]:…”

Section: Methodsmentioning

confidence: 99%

Metasurfaces for Amplitude-Tunable Superposition of Plasmonic Orbital Angular Momentum States

Zhang

et al. 2022

Materials

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The superposition of orbital angular momentum (OAM) in a surface plasmon polariton (SPP) field has attracted much attention in recent years for its potential applications in classical physics problems and quantum communications. The flexible adjustment of the amplitudes of two OAM states can provide more freedom for the manipulation of superposed states. Here, we propose a type of plasmonic metasurface consisting of segmented spiral-shaped nanoslits that not only can generate the superposition of two OAM states with arbitrary topological charges (TCs), but also can independently modulate their relative amplitudes in a flexible manner. The TCs of two OAM states can be simultaneously modulated by incident light, the rotation rate of the nanoslits, and the geometric parameters of the segmented spiral. The relative amplitudes of the two OAM states are freely controllable by meticulously tuning the width of the nanoslits. Under a circularly polarized beam illumination, two OAM states of opposite TCs can be superposed with various weightings. Furthermore, hybrid superposition with different TCs is also demonstrated. The presented design scheme offers an opportunity to develop practical plasmonic devices and on-chip applications.

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Section: Methodsmentioning

confidence: 99%

Metasurfaces for Amplitude-Tunable Superposition of Plasmonic Orbital Angular Momentum States

Zhang

et al. 2022

Materials

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“…SPPs from the inhomogeneity of permittivity with curvilinear boundary [35][36][37]. The plasmon vortices do not arise in case of superposition of the modes reflected from a straight line boundary of the inhomogeneity.…”

Section: Kne Energy and Physicsmentioning

confidence: 99%

Formation of Surface Plasmon-Polariton Vortices at Reflection from Curvilinear Boundary

Pereskokov¹,

Dzedolik²

2018

KEn

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“…Each of the nanoslits in the segmented spiral can be regarded as a source element that can generate an elementary SPP field d E spp at the field point Q ( R , φ). This can be expressed as

d {boldnormalE}_{spp} = {\overset{true^}{e}}_{z} E_{0 Z} e^{- k_{normalz} z} e^{i {boldnormalk}_{r} \cdot (boldnormalR - boldnormalr)} E_{- r} (r, θ) r d θ

where

k_{z} = {(k_{spp}^{2} - k_{0}^{2})}^{1 / 2}

, k r = − k r ê r = − 2π/λ spp ê r , r = r m is the radius of the segmented spiral, and k r ( R − r ) = k r r − R cos(φ −θ). In the above equation, only a z ‐polarized electric field was considered as it is the dominant field component of SPPs.…”

Section: Principle and Structure Designmentioning

confidence: 99%

Manipulation for Superposition of Orbital Angular Momentum States in Surface Plasmon Polaritons

Zhang

Zeng

et al. 2019

Advanced Optical Materials

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states can generate structured spatial light fields via the comprehensive manipulations of the helical phase, polarization, and propagation of the light. Intuitively, the equal-weighted superposition of OAM states with TCs of opposite signs may generate spatial modes of petal-like intensity with nonzero or zero global OAMs, and superpositions of higher-order OAMs may produce wheel-like modes with azimuthal variations of intensity in high dimensions. A variety of methods or devices have been developed to enable the superposition of OAMs. These include liquid crystal q-plates, [1][2][3] spatial light modulators, [4,5] crystal prism pairs, [6] microscopic ring resonators, [7,8] and other optical elements. [9][10][11] Moreover, the progress in OAM superposition has brought about many important applications in classical physics and quantum sciences. Classical applications include particle trapping, [12] optical communications, [13,14] and relativistic laser-matter interactions. [15,16] In the quantum field, important advancements have been made in quantum communications, [17][18][19] quantum information processing, [20,21] and quantum calculations. [22,23] The potential to miniaturize superposed spatial modes of OAM to nanoscale is promising for the implementation of integrated on-chip devices. Metasurfaces consisting of monolayers of subwavelength metallic/dielectric structures have become an efficient way to manipulate light at the subwavelength scale. In recent several years, the study of metasurfaces has attracted great interest in areas as phase-controlled, [24] broadband vectorial holograms, [25] broadband achromatic metalenses, [26] and the coherent control of plasmonic spin-Hall effects. [27] The development of metasurfaces for the manipulation of OAM states has also been studied extensively. [28][29][30][31][32][33][34][35] In the past year, significant progress has been made in achieving arbitrarily controlled OAM superposition states via metasurface engineering. Devlin et al. have proposed the metasurface J-plate to realize the superposition of independent OAM states and to convert SAMs into total angular momentum states. [36] Using a reflective plasmonic metasurface, Yue et al. demonstrated various OAM superpositions in multiple channels by changing the polarization of the illumination. [37,38] By designing a nonlinear plasmonic metasurface for the simultaneous control of the OAM and SAM, Li et al. achieved the OAM superposition of the modes of the second Superposition of orbital angular momentum (OAM) states and the structured intensity are providing new approaches for manipulating optical information and light-matter interactions. While superposition of OAMs in free space has been well studied, further extensions to surface plasmon polariton (SPP) confined in near-field would be crucial for miniaturing and integrating platforms. Here, the plasmonic metasurfaces consisting of rotated nanoslits arranged in a segmented spiral are proposed to realize the superposition of two SPP OAM states. The nanoslit rota...

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Formation of vortices by interference of surface plasmon polaritons

Cited by 10 publications

References 25 publications

Metasurfaces for Amplitude-Tunable Superposition of Plasmonic Orbital Angular Momentum States

Metasurfaces for Amplitude-Tunable Superposition of Plasmonic Orbital Angular Momentum States

Formation of Surface Plasmon-Polariton Vortices at Reflection from Curvilinear Boundary

Manipulation for Superposition of Orbital Angular Momentum States in Surface Plasmon Polaritons

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