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Programmable Hybrid Exceptional Points in Passive Scattering Networks
Kaiyuan Wang, Niall Byrnes, Matthew R. Foreman
Exceptional points (EPs) have long promised enhanced sensing of physical signals, but have practically been limited by simultaneous enhancement of noise. Aligning an EP's non-analy…
Anisotropy in Fourier space optical memory effect correlations
Niall Byrnes, Matthew R. Foreman
We investigate anisotropy in Fourier-domain speckle correlations associated with the optical memory effect in disordered scattering media. Within a single scattering framework, we…
Extended scattering channels for random matrix simulations of polarized light transport
Niall Byrnes, Sulagna Dutta, Matthew R. Foreman
Modeling the propagation of light through disordered media is central to understanding and controlling wave transport in diverse optical and mesoscopic applications. Here, we prese…
Generalized Wigner-Smith theory for perturbations at exceptional and diabolic point degeneracies
Kaiyuan Wang, Niall Byrnes, Matthew R. Foreman
Spectral degeneracies, including diabolic (DP) and exceptional (EP) points, exhibit unique sensitivity to external perturbations, enabling powerful control and engineering of wave…
Topological Engineering of High-Order Exceptional Points through Transformation Optics
Kaiyuan Wang, Qi Jie Wang, Matthew R. Foreman +1
Exceptional points (EPs) in non-Hermitian photonic systems have attracted considerable research interest due to their singular eigenvalue topology and associated anomalous physical…
Perturbing scattering resonances in non-Hermitian systems: a generalized Wigner-Smith operator formulation
Niall Byrnes, Matthew R. Foreman
Resonances of open non-Hermitian systems are associated with the poles of the system scattering matrix. Perturbations of the system cause these poles to shift in the complex freque…