Coherent-perfect-absorber and laser for bound states in a continuum

Abstract

It is shown that two fundamentally different phenomena, the bound states in continuum and the spectral singularity (or time-reversed spectral singularity), can occur simultaneously. This can be achieved, in particular, in a rectangular core dielectric waveguide with embedded active (or absorbing) layer. In such a system a two-dimensional bound state in a continuum is created in the plane of a waveguide cross section and it is emitted or absorbed along the waveguide core. The idea can be used for experimental implementation of a laser or a coherent-perfect-absorber for photonic bound state that resides in a continuous spectrum.

References in corpus (4)

• Coherent Perfect Absorbers: Time-reversed Lasers
• Anisotropy-induced photonic bound states in the continuum
• Phase transition through the splitting of self-dual spectral singularity in optical potentials
• New classes of non-parity-time-symmetric optical potentials with all-real spectra and exceptional-point-free phase transition

Cited by in corpus (14)

• Bound states in the continuum in photonic structures
• Topological properties of bound-states-in-the-continuum in geometries with broken anisotropy-symmetry
• Angular Control of Anisotropy-Induced Bound States in the Continuum
• Rabi oscillations of bound states in the continuum
• Ultra-sensitive Light Confinement Driven by Multiple Bound States in the Continuum
• Fate of Two-Particle Bound States in the Continuum in non-Hermitian Systems
• Spectral singularities and tunable slab lasers with 2D material coating
• Solvable model of bound states in the continuum (BIC) in one dimension
• Solving scattering problems in the half-line using methods developed for scattering in the full line
• Engineering bound states in continuum via nonlinearity induced extra dimension
• Solitary Spectrally-Discrete Bound States in the Continuum in an Open System
• Trapping wave fields in an expulsive potential by means of linear coupling
• Nonlinear dynamics of wave packets in tunnel-coupled harmonic-oscillator traps
• Dispersive bands of bound states in the continuum