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Spectral singularities of odd--symmetric potential
Vladimir V. Konotop, Dmitry A. Zezyulin
We describe one-dimensional stationary scattering of a two-component wave field by a non-Hermitian matrix potential which features odd- symmetry, i.e., symmetry with $(PT)^2=-1…
Coherent perfect absorber and laser for nonlinear waves in optical waveguide arrays
Dmitry A. Zezyulin, Herwig Ott, Vladimir V. Konotop
A localized non-Hermitian potential can operate as a coherent perfect absorber or as a laser for nonlinear waves. The effect is illustrated for an array of optical waveguides, with…
Odd-time reversal symmetry induced by anti--symmetric medium
Vladimir V. Konotop, Dmitry A. Zezyulin
We introduce an optical system (a coupler) obeying parity-time () symmetry with odd-time reversal, . It is implemented with two birefringent waveguides embedded in an a…
Linear and nonlinear coherent perfect absorbers on simple layers
Vladimir V. Konotop, Dmitry A. Zezyulin
We consider linear and nonlinear coherent perfect absorbers (CPAs) in multidimensional geometries and construct explicitly the respective perfectly absorbed solutions. The multidim…