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...

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....

The ever-growing field of microfluidics requires precise and flexible control over fluid flows at reduced scales. Current constraints demand a variety controllable components to carry out several operations inside microchambers microreactors. In this context, brand-new nanophotonic approaches can significantly enhance existing capabilities providing unique functionalities via finely tuned light-matter interactions. A concept is proposed, featuring dual on-chip functionality: boosted...

Dielectric metasurfaces perform unique photonics effects and serve as the engine of nowadays light-matter technologies. Here, we suggest theoretically demonstrate experimentally realization a high transparency effect in novel type all-dielectric metasurface, where each constituting meta-atom lattice presents so-called transverse Kerker effect. In contrast to Huygens' metasurfaces, both phase amplitude incoming wave remain unperturbed at resonant frequency and, consequently, our metasurface...

Abstract All-dielectric nanophotonics has become one of the most active fields research in modern optics, largely due to opportunities offered by simultaneous resonant control electric and magnetic components light at nanoscale. In this rapidly evolving scenario, possibility design artificial Huygens sources overlapping resonances established a new paradigm flat bringing devices closer efficient wavefront shaping with direct phase engineering level individual meta-atoms. However, their...

Non-Hermitian photonic systems with loss and gain attract much attention due to their exceptional abilities in molding the flow of light. Introducing asymmetry PT-symmetric system perfectly balanced gain, we reveal mechanism transition from quasibound state continuum (quasi-BIC) simultaneous coherent perfect absorption (CPA) lasing a layered structure comprising epsilon-near-zero media. Two types (geometric non-Hermitian) are analyzed scattering matrix technique. The effect CPA-lasing...

Abstract Nonradiating sources of energy realized under a wave scattering on high-index dielectric nanoparticles have attracted lot attention in nano-optics and nanophotonics. They do not emit to the far-field, but simultaneously provides strong near-field confinement. Near-field wireless power transfer technologies suffer from low efficiency short operation distance. The key factor improve is reduce radiation loss resonators included transmitter receiver. In this paper, we develop system...

Advancing resonant nanophotonics requires novel building blocks. Recently, cavities in high-index dielectrics have been shown to resonantly confine light inside a lower-index region. These so-called Mie voids represent counterpart solid dielectric resonators, offering functionality such as behavior the ultraviolet spectral However, well-known and highly useful Babinet's principle, which relates scattering of inverse structures, is not strictly applicable for this case it only valid...

Bound states in the continuum and exceptional points are unique singularities of non-Hermitian systems. In optical implementations, former demonstrate strong enhancement electromagnetic field, while latter exhibit high sensitivity to small perturbations. Hence, being actively investigated as next-generation sensors. However, at nanoscale, their performance is strongly constrained by parasitic radiative losses. Here, we show that several bound can be merged into one point, forming a new kind...

Off-axis twisted waveguides possess unique optical properties such as circular and orbital angular momentum (OAM) birefringence, setting them apart from their straight counterparts. Analyzing mode formation in helical relies on the use of specific coordinate frames that follow twist structure. In this paper, differences between modes forming high-contrast off-axis defined three most important systems---the Frenet-Serret, helicoidal, or Overfelt frame---are investigated through numerical...

Discover how breakthroughs in metamaterials can reshape ocean engineering, creating water mirages with the help of carefully designed obstacles.

Bound states in the continuum (BICs) and exceptional points (EPs) are unique singularities of non-Hermitian systems. BICs demonstrate enhancement electromagnetic field at nanoscale, while EPs exhibit high sensitivity to small perturbations. Here, we that several can be merged into one EP, forming an EP-BIC. The resulting state inherits properties from both namely, it does not radiate shows extremely We validate developed theory with numerical simulations formation second third-order EP-BICs...

Due to their tunable physical and chemical properties, alloys are of fundamental importance in material science. The determination stoichiometry is crucial for alloy engineering. Classical characterization tools such as energy-dispersive x-ray spectroscopy (EDX) time consuming cannot be performed an ambient atmosphere. In this context, we introduce a new methodology determine the from ellipsometric measurements. This approach, based on analysis spectra by artificial neural network (ANN),...

In the context of Future Circular Collider (FCC) study, industrial and academic partners are developing novel Nb <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> Sn superconducting wires with a wide variety layouts, production methods, compositions, aim achieving challenging performance targets including non-copper critical current density 1500 A mm <sup xmlns:xlink="http://www.w3.org/1999/xlink">-2</sup> at 16 T 4.2 K. There is clear...

Modern nanophotonics has witnessed the rise of "electric anapoles", destructive interferences electric dipoles and toroidal dipoles, actively exploited to cancel dipole radiation from nanoresonators. However, inherent duality Maxwell's equations suggests intriguing possibility "magnetic involving a nonradiating composition magnetic dipole. Here, we predict, fabricate observe experimentally via series dark field spectroscopy measurements hybrid anapole mixed character, with all dominant...

Here, we show how to use out-of-plane symmetry breaking using easy-to-fabricate truncated nanocones. Using the same shape, it is possible achieve various types of Kerker effects, hybrid anapole regime and other peculiar effects.

Advancing resonant nanophotonics requires novel building blocks. Recently, cavities in high-index dielectrics have been shown to resonantly confine light inside a lower-index region. These so-called Mie voids represent counterpart solid dielectric resonators, offering functionality such as behavior the ultraviolet spectral However, well-known and highly useful Babinet's principle, which relates scattering of inverse structures, is not strictly applicable for this case it only valid...

A distinguishing feature of high-index dielectric nanoparticles is their ability to support strong Mie resonances, thereby enhancing the interaction light with matter and minimizing Ohmic losses, leading unprecedented efficiency. An important advancement in this field investigation "transverse Kerker" effect, which both forward backward scattering are significantly reduced while lateral enhanced. We uncover that realization a perfect transverse Kerker effect possible even passive structures,...

Traditional nanophotonic sensing schemes utilize evanescent fields in dielectric or metallic nanoparticles, which confine far-field radiation dispersive and lossy media. Apart from the lack of a well-defined volume that can be accompanied by moderate sensitivities, these structures suffer generally limited access to modal field, is key for performance. Recently, novel strategy nanophotonics has been demonstrated, namely, resonant confinement light air. So-called Mie voids created high-index...

Abstract In the recent years, all-dielectric nanophotonics has been showing promising potential for biotechnology, with important progress in development of efficient all-optical, nanosensing devices overcoming ohmic losses inherently present their plasmonic counterparts. quest to achieve single molecule sensitivities, a judicious design optical response nanoantennas is required. Here, we approach this problem from perspective non-Hermitian physics and investigate interaction two finite...

Abstract Multipole expansions of the source play an important role in a broad range disciplines modern physics, ranging from description exotic states matter to design nanoantennas photonics. Within context latter, toroidal multipoles, third group multipoles complementing well-known electric and magnetic ones, have been widely investigated since they lead formation non-radiating sources. In last years, however, photonics community has brought light existence fourth type that is commonly...