Abstract All‐dielectric nanophotonics attracts ever increasing attention nowadays due to the possibility of controlling and configuring light scattering on high‐index semiconductor nanoparticles. It opens a room opportunities for designing novel types nanoscale elements devices, paves way advanced technologies energy manipulation. One exciting promising prospects is associated with utilizing so‐called toroidal moment, being result poloidal currents excitation, anapole states, corresponding...

All-dielectric resonant nanophotonics lies at the heart of modern optics and nanotechnology due to unique possibilities control scattering light from high-index dielectric nanoparticles metasurfaces. One important concepts Mie-resonant is associated with Kerker effect that drives unidirectional nanoantennas Huygens' Here we suggest demonstrate experimentally a novel manifested in nearly complete simultaneous suppression both forward backward scattered fields. This governed by Fano...

An effective semianalytical method for analyzing the Cartesian multipole contributions in light transmission and reflection spectra of flat metasurfaces composed identical nanoparticles is developed demonstrated. The combines numerical calculation metasurface coefficients with their decompositions. applied analysis silicon nanocubes or nanocones. In case nanocubes, we numerically demonstrate a ``lattice invisibility effect,'' when goes through almost without amplitude phase perturbations...

We study the Mie-like scattering from an open subwavelength resonator made of a high-index dielectric material, when its parameters are tuned to regime interfering resonances. uncover novel mechanism superscattering, closely linked strong coupling resonant modes and described by physics bound states in continuum (BICs). demonstrate that enhanced occurs due constructive interference Friedrich-Wintgen resonances, allowing push cross section multipole resonance beyond currently established...

Exceptional points are spectral singularities of open systems, where several eigenvalues and eigenvectors coalesce. In photonics, they associated to remarkable phenomena, such as unidirectional scattering, enhanced sensing or chiral mode conversion. this work, we study scattering electromagnetic waves by a single dielectric nanoparticle observe the appearance exceptional in its eigenvalue spectrum. Their existence is linked breaking mirror symmetry particle. Remarkably, mark onset from weak...

Spectral multipole resonances of parallelepiped-, pyramid-, and cone-like shaped silicon nanoparticles excited by linearly polarized light waves are theoretically investigated. The numerical finite element method is applied for the calculations scattering cross sections as a function geometrical parameters. roles moments (up to third order) in process analyzed using semianalytical decomposition approach. possibility pattern configuration due tuning contributions total scattered discussed...

It is well-known that electromagnetic radiation propagates along a straight line, but this common sense was broken by the artificial curved light - Airy beam. In paper, we demonstrate new type of beam besides beam, so called photonic hook. This hook high-intensity focus dielectric trapezoid particle illuminated plane wave. The difference phase velocity and interference waves inside cause phenomenon bending.

Abstract Specialized electromagnetic fields can be used for nanoparticle manipulation along a specific path, allowing enhanced transport and control over the particle’s motion. In this paper, we investigate optical forces produced by curved photonic jet, otherwise known as “photonic hook”, created using an asymmetric cuboid. our case, cuboid is formed appending triangular prism to one side of cube. A gold immersed in cuboid’s transmitted field moves trajectory. This result could moving...

Abstract The development of new approaches to tuning the resonant magnetic response simple all‐dielectric nanostructures is very important in modern nanophotonics. Here, it shown that a octupole (MOCT) can be obtained by dividing solid rectangular silicon block quadrumer structure with introduction narrow gaps between four nanocubes. spectral position MOCT resonance controlled and tuned varying distance It demonstrated several hot‐spots related located creating strong field gradient free...

Abstract Modern nanophotonics has witnessed the rise of “electric anapoles” (EDAs), destructive interferences electric and toroidal dipoles, actively exploited to resonantly decrease radiation from nanoresonators. However, inherent duality in Maxwell equations suggests intriguing possibility “magnetic anapoles,” involving a nonradiating composition magnetic dipole dipole. Here, hybrid anapole (HA) mixed character is predicted observed experimentally via dark field spectroscopy, with all...

All-dielectric nanophotonics opens a venue for variety of novel phenomena and scattering regimes driven by unique optical effects in semiconductor dielectric nanoresonators. Their peculiar signatures enabled simultaneous electric magnetic responses the visible range pave way plenty new applications nano-optics, biology, sensing, etc. In this work, we investigate fabrication-friendly truncated cone resonators achieve several important due to inherent property cones-broken symmetry along main...

Abstract Multipoles are paramount for describing electromagnetic fields in many areas of nanoscale optics, playing an essential role the design devices plasmonics and all‐dielectric nanophotonics. Challenging traditional division into electric magnetic moments, toroidal moments proposed as a physically distinct family multipoles with significant contributions to properties matter. However, apparent impossibility separately measuring their response sheds doubt on true physical significance....

In this Letter, we demonstrate and investigate the Kerker-type effect in high-index dielectric nanoparticles for which third-order multipoles give a considerable contribution to light scattering process. It is shown that (strong suppression of backward and, simultaneously, resonant forward scattering) can be associated with excitation toroidal dipole moment system. This realized due interference scattered waves generated by electric, magnetic, moments nanoparticles.

Abstract We demonstrate both analytically and numerically the existence of optical pulling forces acting on particles located near plasmonic interfaces. Two main factors contribute to appearance this negative recoil force. The interference between incident reflected waves induces a rotating dipole with an asymmetric scattering pattern, while directional excitation surface plasmon polaritons (SPPs) enhances linear momentum scattered light. strongly SPP is determined by spin–orbit coupling...

The ability to manipulate small objects with focused laser beams has opened a venue for investigating dynamical phenomena relevant both fundamental and applied science. Nanophotonic plasmonic structures enable superior performance in optical trapping via highly confined near-fields. In this case, the interplay between excitation field, re-scattered fields eigenmodes of structure can lead remarkable effects; one such effect, as reported here, is particle by light vicinity metal surface....

Being the polymorphs of calcium carbonate (CaCO3), vaterite and calcite have attracted a great deal attention as promising biomaterials for drug delivery tissue engineering applications. Furthermore, they are important biogenic minerals, enabling living organisms to reach specific functions. In nature, monocrystals typically form self-assembled polycrystal micro- nanoparticles, also referred spherulites. Here, we demonstrate that alpine plants belonging Saxifraga genus can tailor light...

The radiation dynamics of optical emitters can be manipulated by properly designed material structures providing high local density photonic states, a phenomenon often referred to as the Purcell effect. Plasmonic nanorod metamaterials with hyperbolic dispersion electromagnetic modes are believed deliver significant enhancement both broadband and non-resonant nature. Here, we have investigated finite-size cavities formed shown that main mechanism effect in these resonators originates from...

Auxiliary nanostructures introduce additional flexibility into optomechanical manipulation schemes. Metamaterials and metasurfaces capable to control electromagnetic interactions at the near-field regions are especially beneficial for achieving improved spatial localization of particles, reducing laser powers required trapping, tailoring directivity optical forces. Here, forces acting on small particles situated next anisotropic substrates, investigated. A special class hyperbolic is...

Control over mechanical motion of nanoscale particles is a valuable functionality desired in variety multidisciplinary applications, e.g., biophysics, and it usually achieved by employing optical forces. Hyperbolic metamaterials enable tailoring enhancing electromagnetic scattering and, as the result, provide platform for new type manipulation. Here pulling forces acting on small particle placed inside hyperbolic metamaterial slab were predicted analyzed. In order to attract light source,...

The symmetry in action and reaction between interacting particulate matter breaks down when the interaction is mediated by an out-of-equilibrium environment. Nevertheless, even this case, space translational invariance still imposes conservation of canonical momentum. Here we show that optical binding asymmetric material system can result non-reciprocal interactions constituents. We demonstrate a non-conservative force applies to center mass optically bound dimer dissimilar particles, which...

Optical binding allows creation of mechanically stable nanoparticle configurations owing to formation self-consistent optical trapping potentials. While the classical diffraction limit prevents achieving deeply subwavelength arrangements, auxiliary nanostructures enable tailoring forces via additional interaction channels. Here, a dimer configuration next metal surface was analyzed in details and contribution plasmon polariton waves found govern dynamics. It shown that channel, mediated by...

A recently introduced femtosecond laser printing technique was further developed for the fabrication of crystalline single Ge and SiGe nanoparticles (NPs). Amorphous thin films deposited by e-beam evaporation on a transparent substrate were used as donors. The approach is based laser-induced forward transfer process, which provides an opportunity NP-controlled positioning different types receiver substrates. size generated can be varied from about 100 to 300 nm depending pulse energy...

Carefully designed nanostructures can inspire a new type of optomechanical interactions and allow surpassing limitations set by classical diffractive optical elements. Apart from strong near-field localization, nanostructured environment allows controlling scattering channels might tailor many-body interactions. Here we investigate an effect binding, where several particles demonstrate collective mechanical behavior bunching together in light field. In contrast to separation distances...

Using the Maxwell-Bloch equations for resonantly absorbing and amplifying media, we study temporal dynamics of light propagation through PT-symmetric structures with alternating loss gain layers. This approach allows us to precisely describe response structure near exceptional points PT-symmetry breaking phase transition and, in particular, take into account nonlinear effect saturation broken state. We reveal that this latter state multilayer system possesses a lasing-like behavior releasing...