Repulsion of polarized particles from two-dimensional materials

Rodríguez-Fortuño, Francisco J.; Picardi, Michela F.; Zayats, Anatoly V.

doi:10.1103/physrevb.97.205401

Cited by 19 publications

(12 citation statements)

References 31 publications

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“…2e support elliptical transverse electric (TE) surface modes barely bounded to the surface and unable to induce significant optical forces on particles located nearby. Towards the normal direction, the acting force may become either attractive or repulsive as a function of the distance between the particle and the metasurface [48], following similar trends as recently reported in the literature [49,50].…”

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confidence: 63%

Giant lateral optical forces on Rayleigh particles near hyperbolic and extremely anisotropic metasurfaces

2019

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We report a dramatic enhancement of the lateral optical forces induced on electrically polarizable Rayleigh particles near hyperbolic and extremely anisotropic metasurfaces under simple plane wave illumination. Such enhancement is enabled by the interplay between the increased density of states provided by these structures and the out-of-plane polarization spin acquired by the particle. The resulting giant lateral forces appear over a broad frequency range and may openunprecedented venues for routing, trapping, and assembling nanoparticles. PACS: 32.10.Dk, 42.25.Fx, 73.20.Mf, 78.67.Wj Light-induced forces have led to many exciting applications in nanotechnology and bioengineering by trapping, pushing, pulling, binding and manipulating nanoparticles and biological samples [1][2][3][4][5][6][7][8]. Recently, the emergence of nano-optical plasmonic configurations has been exploited to boost the strength of optical forces at the nano-scale by exciting surface plasmon polaritons (SPPs) [9][10][11][12], which are confined electromagnetic waves traveling along dielectricmetal interfaces [13]. In fact, illuminating with light an electric, non-magnetic, Rayleigh particle (with radius r < λ 0 /20, being 0 the wavelength) located above a metallic surface like gold or

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confidence: 63%

Giant lateral optical forces on Rayleigh particles near hyperbolic and extremely anisotropic metasurfaces

2019

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“…(4) clearly shows the appearance of extra force terms which are not from the direct illumination. Several works do consider forces from the backscattered fields, and it has been shown that these forces can become very important to the motion of a particle close to a surface and so should not be neglected in general [33,35,[49][50][51][52][53]. We emphasize that any object that supports surface or guided modes can introduce non-trivial forces in this way due to a potentially directional dipole near-field.…”

Section: Near-field Recoil Optical Forcesmentioning

confidence: 99%

Optical forces from near-field directionalities in planar structures

et al. 2019

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Matter manipulation with optical forces has become commonplace in a wide range of research fields and is epitomized by the optical trap. Calculations of optical forces on small illuminated particles typically neglect multiple scattering on nearby structures. However, this scattering can result in large recoil forces, particularly when the scattering includes directional near-field excitations. Nearfield recoil forces have been studied in the case of electric, magnetic and circularly polarized dipoles, but they exist for any type of directional near-field excitation. We use the force angular spectrum as a concise and intuitive analytical expression for the force on any dipole near planar surfaces, which allows us to clearly distinguish the effect due to the dipole, and due to the surface. We relate this directly to the coupling efficiency of surface or guided modes via Fermi's golden rule. To exemplify this, a near-field force transverse to the illumination is computationally calculated for a Huygens dipole near a metallic waveguide. We believe this formalism will prove insightful for various nanomanipulation systems within areas such as nanofluidics, sensing, biotechnology and nano-assembly of nanostructures. arXiv:1811.05237v3 [physics.optics]

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“…[ 11,12 ] Non‐paraxial focusing [ 13,14 ] by small particles [ 15,16 ] or a doped graphene [ 17 ] enhances SOI and results in spin‐dependent directionalities and optical vortices. [ 3 ] In the case of the extreme confinement at the subwavelength scales, SOI is dominant [ 18–21 ] with applications in quantum optics, [ 22,23 ] high‐resolution microscopy, [ 24,25 ] beam shaping with planar metasurfaces, [ 26 ] optical forces [ 27–29 ] , and nanophotonics. [ 30,31 ]…”

Section: Introductionmentioning

confidence: 99%

Electric Control of Spin‐Orbit Coupling in Graphene‐Based Nanostructures with Broken Rotational Symmetry

Ciattoni

Conti

Zayats

et al. 2020

Laser & Photonics Reviews

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Spin and orbital angular momenta of light are important degrees of freedom in nanophotonics which control light propagation, optical forces, and information encoding. Here, it is shown that graphene‐supported plasmonic nanostructures with broken rotational symmetry provide a surprising spin to orbital angular momentum conversion, which can be continuously controlled by changing the electrochemical potential of graphene. Upon resonant illumination by a circularly polarized plane wave, a polygonal array of indium‐tin‐oxide nanoparticles on a graphene sheet generates the scattered field carrying electrically‐tunable orbital angular momentum. This unique photonic spin‐orbit interaction occurs due to the strong coupling between graphene plasmon polaritons and localized surface plasmons of the nanoparticles and leads to the controlled directional excitation of graphene plasmons. The tuneable spin‐orbit conversion paves the way for high‐rate information encoding in optical communications, electric steering functionalities in optical tweezers, and nanorouting of higher‐dimensional entangled photon states.

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Repulsion of polarized particles from two-dimensional materials

Cited by 19 publications

References 31 publications

Giant lateral optical forces on Rayleigh particles near hyperbolic and extremely anisotropic metasurfaces

Giant lateral optical forces on Rayleigh particles near hyperbolic and extremely anisotropic metasurfaces

Optical forces from near-field directionalities in planar structures

Electric Control of Spin‐Orbit Coupling in Graphene‐Based Nanostructures with Broken Rotational Symmetry

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