Towards a Broad-Band Coherent Perfect Absorption in systems without Scale-Invariance
arXiv:2103.03668 · doi:10.1038/s42005-021-00782-2
Abstract
We experimentally and theoretically challenge the concept of coherent perfect absorption (CPA) as a narrow frequency resonant mechanism associated with scattering processes that respect scale-invariance. Using a microwave platform, consisting of a lossy nonlinear resonator coupled to two interrogating antennas, we show that a coherent incident excitation can trigger a self-induced perfect absorption once its intensity exceeds a critical value. Importantly, a (near) perfect absorption persists for a broad band frequency range around the nonlinear CPA condition. Its origin is traced to a quartic behavior that the absorbance spectrum acquires in the proximity of a CPA associated with a new kind of exceptional point degeneracy related to the zeros of the nonlinear scattering operator.
arXiv comment11 pages (Manuscript: 7 pages, 3 figures, Supplemental: 4 pages, 4 figures)
References in corpus (21)
- A Perfect Metamaterial Absorber
- Coherent Perfect Absorbers: Time-reversed Lasers
- Singular-phase nanooptics: towards label-free single molecule detection
- Coherent perfect absorbers: linear control of light with light
- Controlling light-with-light without nonlinearity
- PT-Symmetric Electronics
- Optical absorbers based on strong interference in ultra-thin films
- Coherent perfect absorption in deeply subwavelength films in the single photon regime
- Perfectly absorbing exceptional points and chiral absorbers
- Controlling light with light using coherent meta-devices: all-optical transistor, summator and invertor
- Tight-binding couplings in microwave artificial graphene
- Plasmonic nanoantennas as integrated coherent perfect absorbers on SOI waveguides for modulators and all-optical switches
- Perfect Single-Sided Radiation and Absorption without Mirrors
- Coherent perfect absorption of nonlinear matter waves
- Random Matrix Theory Approach to Chaotic Coherent Perfect Absorbers
- Perfect Absorption in Complex Scattering Systems with or without Hidden Symmetries
- Coherent Perfect Absorption induced by the nonlinearity of a Helmholtz resonator
- Distribution of zeros of the S-matrix of chaotic cavities with localized losses and Coherent Perfect Absorption: non-perturbative results
- Non-Hermitian CT-Symmetric Spectral Protection of Nonlinear Defect Modes
- Nonlinearity Induced Critical Coupling
- Self-Shielded Topological Receiver Protectors
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- Control of the Scattering Properties of Complex Systems By Means of Tunable Metasurfaces
- Robust incoherent perfect absorption
- Detecting and Focusing on a Nonlinear Target in a Complex Medium
- Chiral phase modulation and tunable broadband perfect absorber using the coherent cold atomic ensemble
- Nonlinearity-induced Scattering Zero Degeneracies for Spectral Management of Coherent Perfect Absorption in Complex Systems
- Omni-resonant imaging across the visible
- High-Order Perfect Absorption in the Absence of Exceptional Point
- Robust Wave Splitters Based on Scattering Singularities in Complex non-Hermitian Systems