Ultrasensitive Higher-Order Exceptional Points via Non-Hermitian Zero-Index Materials.
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DOI: 10.1103/18gg-gvzc
Abstract: Higher-order exceptional points (EPs) in optical structures enable ultrasensitive responses to perturbations. However, previous investigations on higher-order EPs have predominantly focused on coupled systems, leaving their fundamental physics in open scattering systems largely unexplored. Here,… read more here.
Keywords: higher order; order exceptional; order eps; exceptional points ... See more keywords
Waveguide-induced coalescence of exceptional points
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DOI: 10.1103/physreva.101.053820
Abstract: In non-Hermitian systems, multiple eigenstates can merge into one state at so-called exceptional points (EPs). This paper presents the coalescence of the multiple EPs based on a waveguide. For the ring cavities located at the… read more here.
Keywords: exceptional points; second order; coalescence; waveguide induced ... See more keywords
Symmetry and Higher-Order Exceptional Points.
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DOI: 10.1103/physrevlett.127.186601
Abstract: Exceptional points (EPs), at which both eigenvalues and eigenvectors coalesce, are ubiquitous and unique features of non-Hermitian systems. Second-order EPs are by far the most studied due to their abundance, requiring only the tuning of… read more here.
Keywords: order; third order; exceptional points; higher order ... See more keywords