Exceptional Points in Flat Optics: A Non-Hermitian Line-Wave Scenario

@inproceedings{Moccia2021ExceptionalPI,
  title={Exceptional Points in Flat Optics: A Non-Hermitian Line-Wave Scenario},
  author={Massimo Moccia and Giuseppe Castaldi and Francesco Monticone and Vincenzo Galdi},
  year={2021}
}
Line waves are recently discovered wave entities that are localized along two directions and therefore can be viewed as the one-dimensional counterpart of surface waves. These waves can be supported at discontinuities of the surface reactance and/or resistance of low-dimensional materials such as metasurfaces or graphene. Here, a broader class of non-Hermitian surface-impedance junctions is studied that can support coupled line waves and that allows the investigation of different one… Expand

References

SHOWING 1-10 OF 54 REFERENCES
Manipulating line waves in flat graphene for agile terahertz applications
Abstract Reducing open waveguides enabled by surface waves, such as surface plasmon polaritons, to a one-dimensional line is attractive due to the potentially enhanced control over light confinementExpand
Guiding Waves Along an Infinitesimal Line between Impedance Surfaces.
We present a new electromagnetic mode that forms at the interface between two planar surfaces laid side by side in free space, effectively guiding energy along an infinitesimal, one-dimensional line.Expand
Topological Waveguiding near an Exceptional Point: Defect-Immune, Slow-Light, and Loss-Immune Propagation.
TLDR
This Letter drastically modify typical guided-wave behavior by combining concepts from non-Hermitian physics and topological photonics and finds that, by operating near an exceptional point, it can realize anomalous topological wave propagation with, at the same time, low group velocity, inherent immunity to backscattering at discontinuities, and immunity to losses. Expand
Exceptional points in optics and photonics
TLDR
The topic of exceptional points in photonics is reviewed and some of the possible exotic behavior that might be expected from engineering such systems are explored, as well as new angle of utilizing gain and loss as new degrees of freedom, in stark contrast with the traditional approach of avoiding these elements. Expand
Non-Hermitian and topological photonics: optics at an exceptional point
Abstract In the past few years, concepts from non-Hermitian (NH) physics, originally developed within the context of quantum field theories, have been successfully deployed over a wide range ofExpand
Exceptional Points of Degeneracy and Branch Points for Coupled Transmission Lines—Linear-Algebra and Bifurcation Theory Perspectives
We provide a new angle to investigate exceptional points of degeneracy (EPD) relating the current linear-algebra point of view to bifurcation theory. We apply these concepts to EPDs related toExpand
Spawning rings of exceptional points out of Dirac cones
TLDR
The results indicate that the radiation existing in any open system can fundamentally alter its physical properties in ways previously expected only in the presence of material loss and gain. Expand
Conservation relations and anisotropic transmission resonances in one-dimensional PT-symmetric photonic heterostructures
We analyze the optical properties of one-dimensional PT-symmetric structures of arbitrary complexity. These structures violate normal unitarity (photon flux conservation) but are shown to satisfyExpand
Pathological scattering by a defect in a slow-light periodic layered medium
Scattering of electromagnetic fields by a defect layer embedded in a slow-light periodically layered ambient medium exhibits phenomena markedly different from typical scattering problems. In aExpand
Exceptional points of degeneracy and P T symmetry in photonic coupled chains of scatterers
We demonstrate the existence of exceptional points of degeneracy (EPDs) of periodic eigenstates in non-Hermitian coupled chains of dipolar scatterers. Guided modes supported by these structures canExpand
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