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Full-Text Articles in Physical Sciences and Mathematics
Critical States Embedded In The Continuum, Milan Koirala, Alexey Yamilov, A. Basiri, Yaron Bromberg, Hui Cao, Tsampikos Kottos
Critical States Embedded In The Continuum, Milan Koirala, Alexey Yamilov, A. Basiri, Yaron Bromberg, Hui Cao, Tsampikos Kottos
Physics Faculty Research & Creative Works
Weintroduce a class of critical states which are embedded in the continuum (CSC) of a one-dimensional optical waveguide array with one non-Hermitian defect. These states are on the verge of being fractal and have real propagation constants. They emerge at a phase transition which is driven by the imaginary refractive index of the defective waveguide and it is accompanied by a mode segregation which reveals analogies with the Dicke super-radiance. Below this point the states are extended while above it they evolve to exponentially localized modes. An addition of a background gain or loss can turn these localized states into …
Critical States Embedded In The Continuum, Milan Koirala, Alexey Yamilov, A. Basiri, Yaron Bromberg, Hui Cao, Tsampikos Kottos
Critical States Embedded In The Continuum, Milan Koirala, Alexey Yamilov, A. Basiri, Yaron Bromberg, Hui Cao, Tsampikos Kottos
Physics Faculty Research & Creative Works
We introduce a class of critical states which are embedded in the continuum (CSC) of a one-dimensional optical waveguide array with one non-Hermitian defect. These states are on the verge of being fractal and have real propagation constants. They emerge at a phase transition which is driven by the imaginary refractive index of the defective waveguide and it is accompanied by a mode segregation which reveals analogies with the Dicke super-radiance. Below this point the states are extended while above it they evolve to exponentially localized modes. An addition of a background gain or loss can turn these localized states …