Zero-index bound states in the continuum

Abstract

Metamaterials with an effective zero refractive index associated to their electromagnetic response are sought for a number of applications in communications and nonlinear optics. A promising way that this can be achieved in all-dielectric photonic crystals is through the design of a Dirac cone at zero Bloch wave-vector in the photonic band structure. In the optical frequency range, the natural way to implement this design is through the use of a photonic crystal slab. In the existing implementation, however, the zero-index photonic modes also radiate strongly into the environment due to intrinsic symmetry properties. This has resulted in large losses in recent experimental realizations of this zero-index paradigm. Here, we propose a photonic crystal slab with zero-index modes which are also symmetry-protected bound states in the continuum. Our approach thus eliminates the associated radiation loss. This could enable, for the first time, large-scale integration of zero-index materials in photonic devices.

References in corpus (9)

• Epsilon-Near-Zero (ENZ) Metamaterials and Electromagnetic Sources: Tailoring the Radiation Phase Pattern
• Realization of an all-dielectric zero-index optical metamaterial
• Enhanced nonlinear refractive index in epsilon-near-zero materials
• Super-reflection and Cloaking Based on Zero Index Metamaterial
• Inverse design of third-order Dirac exceptional points in photonic crystals
• Photonic-crystal slabs with a triangular lattice of triangular holes investigated using a guided-mode expansion method
• Reflectionless Sharp Bends and Corners in Waveguides Using Epsilon-Near-Zero Effects
• Realization of Dirac Point with Double Cones in Optics
• Monolithic CMOS-compatible zero-index metamaterials

Cited by in corpus (35)

• Nonradiating Photonics with Resonant Dielectric Nanostructures
• Applications of Bound States in the Continuum in Photonics
• Topological photonic crystals: physics, designs and applications
• Inverse design of photonic crystals through automatic differentiation
• Bound states in the continuum of higher-order topological insulators
• Topological metasurface: From passive toward active and beyond
• Elastic Bound State in the Continuum with Perfect Mode Conversion
• General bound states in the continuum in momentum space
• Bound states in the continuum through environmental design
• Low-loss Zero-Index Materials
• Observation of bound states in the continuum embedded in symmetry bandgaps
• Three-dimensional Electromagnetic Void Space
• Coupled electric and magnetic dipole formulation for planar arrays of dipolar particles: metasurfaces with various electric and/or magnetic meta-atoms per unit cell
• Polarization-independent isotropic nonlocal metasurfaces with wavelength-controlled functionality
• One-dimensional quasi bound states in the continuum in the ω~k space for nonlinear optical applications
• Mechanical bound states in the continuum for macroscopic optomechanics
• Metasurfaces with bound states in the continuum enabled by eliminating first Fourier harmonic component in lattice parameters
• Relaxed phase-matching constraints in zero-index waveguides
• Angular Control of Anisotropy-Induced Bound States in the Continuum
• Unidirectional guided resonances in anisotropic waveguides
• Dirac Points Embedded in the Continuum
• Controllable finite ultra-narrow quality-factor peak in a perturbed Dirac-cone band structure of a photonic crystal slab
• Ultra-thin, entirely flat, Umklapp lenses
• Multiple Embedded Eigenstates in Nonlocal Plasmonic Nanostructures
• Bound States in the Continuum and Fano Resonances in the Dirac Cone Spectrum
• Broadband Parametric Downconversion as a Discrete-Continuum Fano Interaction
• Monopole Embedded Eigenstate in Nonlocal epsilon-Near Zero Nanostructures
• Zero-index and Hyperbolic Metacavities: Fundamentals and Applications
• Bound states in and out of the continuum in nanoribbons with wider sections: A novel recursive S-matrix method
• Deterministic steady-state subradiance within a single-excitation basis
• Solitary Spectrally-Discrete Bound States in the Continuum in an Open System
• Electromagnetic Duality Symmetry-Protected Dirac-Like Cones
• Robust Topological Bound States in the Continuum in a Quantum Hall Bar with an Anti-dot
• Surface Bound States in the Continuum in Dyakonov Structures
• Magnetically Tunable Chiral Phonon Polaritons with Magneto-optical Bound States in the Continuum