We demonstrate theoretically that Fano resonance can induce a negative optical scattering force acting on plasmonic nanoparticles in the visible light spectrum when an appropriate manipulating laser beam is adopted. Under illumination of zeroth-order Bessel beam, nanoparticle at its exhibits much stronger forward than backward and consequently leads to net longitudinal force, termed resonance-induced force. The extinction spectra obtained based Mie theory show arises from interference...

By employing the angular spectrum representation, we successfully derive partial-wave expansion coefficients of circular Airy beams (CABs) with different polarizations, based on which scattering a spherical particle in CABs is solved exactly. Special attention focused exploring potential applications abruptly autofocusing (AAF) property and optical manipulation microparticle by force. It found that both linear polarizations are best candidates to implement AAF robustly against strong...

We demonstrate that a lateral optical force (LOF) can be induced on chiral nanoparticles immersed in the two interfering plane waves. The LOF push nanoparticle sideways, direction relying helicity of particle as well phase difference between Analytical theory reveals comes mostly from direct coupling vorticity with chirality. In particular, has magnitude comparable to gradient and radiation pressure when chirality is sufficiently large. may serve for sorting due its unusual properties also...

We demonstrate a magnetically controllable nonreciprocal Goos-H\"anchen (GH) shift enabled by the magnetic plasmonic gradient metasurfaces (GMSs) consisting of an array ferrite rods with rotation introduced to rod dimers in unit cell. The incident Gaussian beam is observed exhibit evident GH about $5\ensuremath{\lambda}$ when it from one side, whereas for geometrically symmetric direction respect surface normal only very small comes into appearance. phenomenon arises unidirectional coupling...

Lateral optical forces in a direction perpendicular to light propagation have attracted increasing interest recent years. Up now, all lateral can be attributed the symmetry breaking directions caused by either morphology of scatterer geometry or fields impinging on scatterer. Here we demonstrate, both numerically and analytically, that when an isotropic breaks electric-magnetic symmetry, new type anomalous force induced along translational invariance where illumination striking has no...

Based on the Mie scattering theory and Maxwell stress tensor method, we investigate transverse optical force (TOF) acting chiral particles illuminated by a zero-order Bessel beam. It is demonstrated that particle chirality can induce an azimuthal (AOF), resulting in orbital motion of around beam axis. The AOF depends strongly loss as well handedness chirality, with its amplitude capable changing over order magnitude particle's loss. other component TOF, radial (ROF), much less sensitive to...

We demonstrate that a lateral optical force (LOF) can be induced on paired chiral nanoparticles with opposite handedness under the illumination of linearly polarized plane wave. The LOFs both particles are equal and thus move pair sideways, direction depending separation between two particles, as well particle chirality. Analytical theory reveals LOF comes largely from potential gradient established by multiple scattering light asymmetric In addition, it is weakly dependent material loss...

Based on the generalized Lorenz-Mie theory and Maxwell stress tensor approach we present first rigorous full-wave solution of optical forces acting spherical microparticles immersed in a two-dimensional vector Airy beam beyond paraxial approximation. The critical aspect lies evaluating efficiently accurately partial wave expansion coefficients incident beam, which are achieved by using angular spectrum representation for variety polarizations. field distributions then simulated to show...

We demonstrate a design of perfect unidirectional absorber by constructing magnetic metamaterial (MM) made an array ferrite rods. Near the surface plasmon (MSP) resonance incident transverse (TM) Gaussian beam can be absorbed completely at particular direction, while symmetrically opposite direction obvious reflected is observed. This unidirectionality originates from time reversal symmetry (TRS)-breaking nature MM, which also shown numerically comparing scattering amplitude partial waves in...

We demonstrate a reconfigurable lateral optical force (OF) on plasmonic nanoparticle immersed in simple field invariant along the direction and formed by two interfering plane waves. This OF is shown, from multipolar expansion technique, attributed to several coupling channels established between multiple multipoles excited nanoparticle, particular, adjacent electric multipole modes that bring about Fano interferences, which can substantially enhance scattering asymmetry, leading an...

One of the theoretical challenges in studying optical trapping is decomposition force into gradient (conservative component) and scattering (nonconservative component), which can be achieved either for Raleigh particles or very large regime ray optics. However, moderate between these two limits, scenario still a mystery. In this paper we present approach to bridge gap fully split acting on spherical particle immersed generic monochromatic free-space field such essentially different...

Based on the full wave simulation, we demonstrate that a circularly polarized vector Airy beam can selectively transport small chiral particles along curved trajectory via chirality-tailored optical forces. The transverse forces draw with different particle chirality towards or away from intensity maxima of beam, leading to selective trapping in plane. transversely trapped are then accelerated by longitudinal scattering force, rendering an alternative way sort and/or specified helicity....

We present the Cartesian multipole expansion theory for computing optical force acting on a spherical chiral particle immersed in generic monochromatic fields. The enables us to develop general formulations individually calculating gradient and scattering forces (also known as conservative nonconservative forces) of arbitrary size. A set analytical expressions are then derived field modeled by series homogenous plane waves. As examples applications, we reveal that, lattice composed three...

Abstract We investigate the formation of inner edge states and their transport properties in hybrid nanoribbons. Some new states, such as spin-polarized, spin-valley-polarized valley-polarized antichiral are obtained, different from current existence valley- spin-valley-momentum locked states. also obtain general formula local bond with wave-function matching technique use it to discover three interesting phenomena intravalley intervalley scatterings that depend on propagating direction,...

We derive an analytical expression of the optical torque (OT) on chiral particles in generic monochromatic fields within dipole approximation. Besides extinction terms owing to interaction between dipoles excited particle and incident field, our includes also some long missing that are understood as recoil due radiation particle. The shown have a significant contribution OT many situations. Inspired by expression, we further proved net vanishes for lossless isotropic spherical any size...

SKINNY is a family of lightweight block ciphers proposed at CRYPTO 2016, which follows the TWEAKEY framework and takes tweakey input. It shown that not only has good hardware/software performances, but also provides strong security guarantees against differential/linear cryptanalysis. In this study, authors study impossible differential attack. First, they get some properties subkeys by analysing its key schedule. Then, combining with early-abort technique greedy strategy, present attacks on...

We demonstrate numerically and analytically the optical binding between a pair of chiral nanoparticles immersed in plane wave linear polarization. The numerical results based on full simulation show that, when electric field incident is polarized along axis (the line connecting particle pair), closest dimer can be formed at separation around $1.25\ensuremath{\lambda}$, with $\ensuremath{\lambda}$ denoting wavelength, while normal to axis, nearest one wavelength. In both cases, there exist...

The large-scale preparation of stable graphene aqueous dispersion has been a challenge in the theoretical research and industrial applications graphene. This study determined suitable exfoliation agent for overcoming van der Waals force between layers expanded graphite sheets using liquid-phase method on basis surface energy theory to prepare single layer To evenly stably disperse pure water, dispersants were selected based Hansen solubility parameters, namely, hydrophilicity, heterocyclic...

The working mechanism of optical tweezers is generally believed to be the gradient force arising from light intensity inhomogeneity an incident field. Here we demonstrate a somewhat counterintuitive phenomenon---optical trapping chiral particles relying on emerging in field with homogeneous intensity. This type shown survive even Rayleigh limit, where particle size far smaller than illuminating wavelength. By deriving rigorous analytical expression for exerted particle, origin such traced...

An arbitrary conical angle is introduced to the circular Airy beam (CAB) beyond paraxial approximation, with possibility demonstrate its obvious tunability for propagation properties of CAB. The expressions are worked out describe electric field based on angular spectrum representation, where a closed-form approximation derived by using stationary phase method. It found that nonparaxiality becomes large angles. In particular, intensity at focal point can be enhanced about 10 times respect...

We theoretically and numerically demonstrate that Fano-like resonance can induce a left-handed optical torque on dipolar plasmonic core-shell nanoparticle in the interference field composed of two linearly polarized plane waves. It is shown significantly enhanced at resonance, its direction opposite to angular momentum incident field, termed resonance-induced torque. The extinction spectra exhibit stems from coupling between narrow electric quadrupole dark mode broad dipole bright mode. In...