Nonlinearity-induced Scattering Zero Degeneracies for Spectral Management of Coherent Perfect Absorption in Complex Systems
arXiv:2403.10690 · doi:10.1103/PhysRevApplied.22.064093
Abstract
We develop a Coherent Perfect Absorption (CPA) protocol for cases where scale invariance is violated due to the presence of nonlinear mechanisms. We demonstrate, using a microwave setting that lacks geometrical symmetries, that the nonlinearity offers new reconfigurable modalities: the destruction or formation of nonlinear CPAs (NL-CPAs), and their frequency positioning and bandwidth management using the incident power as a control knob. The latter occurs via the formation of exceptional point degeneracies of the zeroes of nonlinear scattering processes. Our results establish NL-CPA protocols as a versatile scheme for the creation of reconfigurable hot/cold-spots in complicated enclosures (e.g. buildings or vessels) with applications to next-generation telecommunications, long-range wireless power transfer, and electromagnetic warfare.
16 pages, 9 figures
References in corpus (7)
- Coherent Perfect Absorbers: Time-reversed Lasers
- Observation of coherent perfect absorption at an exceptional point
- Observation of Chiral State Transfer Without Encircling an Exceptional Point
- Random Matrix Theory Approach to Chaotic Coherent Perfect Absorbers
- Reflective Optical Limiter Based on Resonant Transmission
- Statistical properties of resonance widths for open Quantum Graphs
- Optical Limiter Based on PT-Symmetry Breaking of Reflectionless Modes