High-order exceptional points and enhanced sensing in subwavelength resonator arrays
arXiv:2008.00799
Abstract
Systems exhibiting degeneracies known as exceptional points have remarkable properties with powerful applications, particularly in sensor design. These degeneracies are formed when eigenstates coincide, and the remarkable effects are exaggerated by increasing the order of the exceptional point (that is, the number of coinciding eigenstates). In this work, we use asymptotic techniques to study PT-symmetric arrays of many subwavelength resonators and search for high-order asymptotic exceptional points. This analysis reveals the range of different configurations that can give rise to high-order exceptional points and provides efficient techniques to compute them. We also show how systems exhibiting high-order exceptional points can be used for sensitivity enhancement.
References in corpus (9)
- The physics of exceptional points
- Coalescence of spectral singularities and phase diagrams for one-dimensional PT symmetric photonic crystals
- High-order exceptional points in supersymmetric arrays
- Topologically protected edge modes in one-dimensional chains of subwavelength resonators
- Higher-order exceptional points in all-magnetic structures
- Super-resolution in high contrast media
- Exceptional points for resonant states on parallel circular dielectric cylinders
- Exceptional Points of Resonant States on a Periodic Slab
- Edge modes in active systems of subwavelength resonators