Fano resonance
View article
Bound states in the continuum and Fano resonances in the strong mode coupling regime Open
The study of resonant dielectric nanostructures with a high refractive index is a new research direction in the nanoscale optics and metamaterial-inspired nanophotonics. Because of the unique optically induced electric and magnetic Mie res…
View article
Broken Symmetry Dielectric Resonators for High Quality Factor Fano Metasurfaces Open
We present a new approach to dielectric metasurface design that relies on a single resonator per unit cell and produces robust, high quality factor Fano resonances. Our approach utilizes symmetry breaking of highly symmetric resonator geom…
View article
Chiral Quasi-Bound States in the Continuum Open
Quasi-bound states in the continuum (QBICs) are Fano resonant states with long optical lifetimes controlled by symmetry-breaking perturbations. While conventional Fano responses are limited to linear polarizations and do not support tailor…
View article
Symmetry‐Protected Dual Bound States in the Continuum in Metamaterials Open
Bound state in the continuum (BIC) is a mathematical concept with an infinite radiative quality factor ( Q ) that exists only in an ideal infinite array of resonators. In photonics, it is essential to achieve high Q resonances for enhanced…
View article
Attosecond dynamics through a Fano resonance: Monitoring the birth of a photoelectron Open
Watching as helium goes topsy-turvy Theorists have long pondered the underpinnings of the Fano resonance, a spectral feature that resembles adjacent rightside-up and upside-down peaks. An especially well-studied instance of this feature ap…
View article
Enhanced Second-Harmonic Generation Using Broken Symmetry III–V Semiconductor Fano Metasurfaces Open
All-dielectric metasurfaces, two-dimensional arrays of subwavelength low loss dielectric inclusions, can be used not only to control the amplitude and phase of optical beams, but also to generate new wavelengths through enhanced nonlinear …
View article
Sensing with toroidal metamaterial Open
Localized electromagnetic excitation in the form of toroidal dipoles has recently been observed in metamaterial systems. The origin of the toroidal dipole lies in the currents flowing on the surface of a torus. Thus, the exotic toroidal ex…
View article
Active Photoswitching of Sharp Fano Resonances in THz Metadevices Open
Fano resonances offer exciting features in enhancing the non-linearity and sensing capabilities in metamaterial systems. An active photoswitching of Fano resonances in a terahertz metadevice at low optical pump powers is demonstrated, whic…
View article
Transverse Scattering and Generalized Kerker Effects in All-Dielectric Mie-Resonant Metaoptics Open
All-dielectric resonant nanophotonics lies at the heart of modern optics and nanotechnology due to the unique possibilities to control scattering of light from high-index dielectric nanoparticles and metasurfaces. One of the important conc…
View article
Lattice modes and plasmonic linewidth engineering in gold and aluminum nanoparticle arrays Open
Metallic nanoparticles arranged in arrays have been shown to support both localized surface plasmons (LSPs) and diffractive grating behavior, related to the inter-particle period. By selecting both the period and particle size, it is possi…
View article
Spectral and temporal evidence of robust photonic bound states in the continuum on terahertz metasurfaces Open
Fano resonances and bound states in the continuum (BICs) exhibit a rich\nphenomenology stemming from, respectively, their asymmetric line shapes and\ninfinite quality factors. Here, we show experimentally and theoretically that\nrod dimer …
View article
Role of epsilon-near-zero substrates in the optical response of plasmonic antennas Open
Radiation patterns and the resonance wavelength of a plasmonic antenna are significantly influenced by its local environment, particularly its substrate. Here, we experimentally explore the role of dispersive substrates, such as aluminum- …
View article
Topological Fano Resonances Open
The Fano resonance is a widespread wave scattering phenomenon associated with a peculiar asymmetric and ultrasharp line shape, which has found applications in a large variety of prominent optical devices. While its substantial sensitivity …
View article
Surface Plasmonic Sensors: Sensing Mechanism and Recent Applications Open
Surface plasmonic sensors have been widely used in biology, chemistry, and environment monitoring. These sensors exhibit extraordinary sensitivity based on surface plasmon resonance (SPR) or localized surface plasmon resonance (LSPR) effec…
View article
Fano Resonance Based on Metal-Insulator-Metal Waveguide-Coupled Double Rectangular Cavities for Plasmonic Nanosensors Open
A refractive index sensor based on metal-insulator-metal (MIM) waveguides coupled double rectangular cavities is proposed and investigated numerically using the finite element method (FEM). The transmission properties and refractive index …
View article
Efficient spectrum prediction and inverse design for plasmonic waveguide systems based on artificial neural networks Open
In this article, we propose a novel approach to achieve spectrum prediction,\nparameter fitting, inverse design and performance optimization for the\nplasmonic waveguide coupled with cavities structure (PWCCS) based on artificial\nneural n…
View article
Fano resonances based on multimode and degenerate mode interference in plasmonic resonator system Open
In this paper, three Fano resonances based on three different physical mechanisms are theoretically and numerically investigated in a plasmonic resonator system, comprised of two circular cavities. And the multimode interference coupled mo…
View article
Hybrid bound states in the continuum in terahertz metasurfaces Open
Bound states in the continuum (BICs) have exhibited extraordinary properties in photonics for enhanced light-matter interactions that enable appealing applications in nonlinear optics, biosensors, and ultrafast optical switches. The most c…
View article
Refractive Index Sensor Based on Fano Resonances in Metal-Insulator-Metal Waveguides Coupled with Resonators Open
A surface plasmon polariton refractive index sensor based on Fano resonances in metal–insulator–metal (MIM) waveguides coupled with rectangular and ring resonators is proposed and numerically investigated using a finite element method. Fan…
View article
Strong interaction between graphene layer and Fano resonance in terahertz metamaterials Open
Graphene has emerged as a promising building block in the modern optics and\noptoelectronics due to its novel optical and electrical properties. In the\nmid-infrared and terahertz (THz) regime, graphene behaves like metals and\nsupports su…
View article
Refractive Index Sensor Based on Fano Resonances in Plasmonic Waveguide With Dual Side-Coupled Ring Resonators Open
A refractive index sensor based on Fano resonances in metal-insulator-metal (MIM) waveguides coupled with rectangular and dual side rings resonators is proposed. The sensing properties are numerically simulated by the finite element method…
View article
High-sensitivity complex refractive index sensing based on Fano resonance in the subwavelength grating waveguide micro-ring resonator Open
High-sensitivity complex refractive index sensing is proposed and experimentally demonstrated, favoring with sharp Fano resonance at 1550 nm wavelength based on subwavelength grating waveguide (SWG) micro-ring resonator. The micro-ring is …
View article
MIM waveguide structure consisting of a semicircular resonant cavity coupled with a key-shaped resonant cavity Open
We describe the optical transmission properties of a surface plasmon polariton waveguide structure consisting of a metal-insulator-metal (MIM) waveguide and a semicircular resonant cavity coupled with a key-shaped resonant cavity. Finite e…
View article
Toroidal dipole bound states in the continuum metasurfaces for terahertz nanofilm sensing Open
A novel terahertz nanofilm sensor consisting of toroidal dipole bound states in the continuum (TD-BIC) inspired Fano resonance metasurface is proposed and investigated, which exhibits both the TD character and BIC feature. When the mirror …
View article
Terahertz sensing of highly absorptive water-methanol mixtures with multiple resonances in metamaterials Open
Terahertz sensing of highly absorptive aqueous solutions remains challenging due to strong absorption of water in the terahertz regime. Here, we experimentally demonstrate a cost-effective metamaterial-based sensor integrated with terahert…
View article
Giant in-particle field concentration and Fano resonances at light scattering by high-refractive-index particles Open
We present the results of a detailed analytical study of light scattering by a particle with high refractive index m+iκ and low losses (m≫1,0<κ≪1) based on the exact Mie solution. We show that there is a dramatic difference in the behavior…
View article
Tunable Fano Resonance and Enhanced Sensing in a Simple Au/TiO2 Hybrid Metasurface Open
We investigate Fano resonances and sensing enhancements in a simple Au/TiO2 hybrid metasurface through the finite-different time-domain (FDTD) simulation and coupled mode theory (CMT) analysis. The results show that the Fano resonance in t…
View article
Fano Resonance in an Asymmetric MIM Waveguide Structure and Its Application in a Refractive Index Nanosensor Open
Herein, the design for a tunable plasmonic refractive index nanosensor is presented. The sensor is composed of a metal–insulator–metal waveguide with a baffle and a circular split-ring resonator cavity. Analysis of transmission characteris…
View article
Multiple Fano resonances excitation on all-dielectric nanohole arrays metasurfaces Open
Both toroidal dipoles, electric dipoles and magnetic dipoles belong to one type of electromagnetic excitation. In this paper, we present an all-dielectric metasurface composed of an array of square nanoholes. It can simultaneously generate…
View article
Tunable Fano Resonance in Asymmetric MIM Waveguide Structure Open
A plasmonic waveguide coupled system that uses a metal-insulator-metal (MIM) waveguide with two silver baffles and a coupled ring cavity is proposed in this study. The transmission properties of the plasmonic system were investigated using…