High-Order Perfect Absorption in the Absence of Exceptional Point
arXiv:2603.29770 · doi:10.1103/nkls-pgkf
Abstract
High-order perfect absorption of coherent input has recently attracted significant attention due to its broadband absorption capacity. However, the realization of a high-order perfect absorber relies on the exceptional point (EP) to coalesce the scattering zeros. Here, we present a general scattering framework and achieve the high-order perfect absorber in the absence of EP. We consider the asynchronous coherent input, where a spatial delay introduces a momentum-dependent phase factor beyond the amplitude and phase control in synchronous coherent input. This new degree of freedom enables active control of the momentum dependent output, effectively reshaping the absorption line shape necessary for the high-order perfect absorber. Remarkably, despite the absence of EP, the proposed high-order perfect absorber exhibits significant response to the perturbations in the delay length. Our findings provide insights for the delay induced momentum-sensitive interference phenomenon and offer a new route for wave control.
arXiv comment8 pages, 4 figures
References in corpus (51)
- Coherent Perfect Absorbers: Time-reversed Lasers
- Broadband electro-optic frequency comb generation in an integrated microring resonator
- PT-symmetry breaking and laser-absorber modes in optical scattering systems
- PT-symmetric laser-absorber
- Quantum wave packet revivals
- Synthetic Dimension in Photonics
- Coherent perfect absorbers: linear control of light with light
- Observation of coherent perfect absorption at an exceptional point
- A single photonic cavity with two independent physical synthetic dimensions
- Quantum Noise Theory of Exceptional Point Sensors
- Sensing with exceptional surfaces: combining sensitivity with robustness
- Tunable non-reciprocal quantum transport through a dissipative Aharonov-Bohm ring in ultracold atoms
- Perfect coupling of light to surface plasmons by coherent absorption
- Perfectly absorbing exceptional points and chiral absorbers
- Chiral Coherent Perfect Absorption on Exceptional Surfaces
- Thermal radiation and amplified spontaneous emission from a random medium
- Incident Direction Independent Wave Propagation and Unidirectional Lasing
- Catching Shaped Microwave Photons with 99.4% Absorption Efficiency
- Non-Hermitian Acoustic Metamaterials: the role of Exceptional Points in sound absorption
- Spatio-temporal Control of Light Transmission through a Multimode Fiber with Strong Mode Coupling
- Giant Atoms in a Synthetic Frequency Dimension
- Coherent perfect absorption of nonlinear matter waves
- Hierarchical construction of higher-order exceptional points
- Quantum sensing with a single-qubit pseudo-Hermitian system
- Quantum time reflection and refraction of ultracold atoms
- Excite atom-photon bound state inside the coupled-resonator waveguide coupled with a giant atom
- Fundamental Sensitivity Limits for non-Hermitian Quantum Sensors
- Anomalous time delays and quantum weak measurements in optical micro-resonators
- A comprehensive review on developments of synthetic dimensions
- Symmetry-Protected Scattering in Non-Hermitian Linear Systems
- Non-Hermitian sensing in the absence of exceptional points
- Coupling single atoms to a nanophotonic whispering-gallery-mode resonator via optical guiding
- Towards a Broad-Band Coherent Perfect Absorption in systems without Scale-Invariance
- Time reflection and refraction in synthetic frequency dimension
- Coherent Perfect Absorption of Arbitrary Wavefronts at an Exceptional Point
- Partitioning technique for a discrete quantum system
- Pseudo-Hermiticity protects the energy-difference conservation in the scattering
- Ultrasensitive Higher-Order Exceptional Points via Non-Hermitian Zero-Index Materials
- Coherent resonant transmission
- Wave momentum shaping for moving objects in heterogeneous and dynamic media
- Extreme narrow band in Moiré Photonic time crystal
- High-order spectral singularity
- Noise Properties of Coherent Perfect Absorbers and Critically-coupled Resonators
- Separation of Wigner and Continuum-continuum Delays by Mirror-symmetry-broken Attosecond Interferometry
- Wigner time delay induced by a single quantum dot
- Probing Bulk Band Topology from Time Boundary Effect in Synthetic Dimension
- Construction of various time-dependent Hamiltonians on a single photonic chip
- Universal behavior of the scattering matrix near thresholds in photonics
- Robust incoherent perfect absorption
- Wave manipulation via delay-engineered periodic potentials
- Directional transport and nonlinear localization of light in a one-dimensional driven-dissipative photonic lattice