Light propagation through a PT-symmetric photonic crystalстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 12 января 2017 г.
Аннотация:Light propagation through a finite-width periodically modulated layer obeying parity-time ($\PT$) symmetry is considered. We are interested in the configuration when the resonant conditions of mode coupling by the grating are satisfied. It is shown that the dependence of the transmission and reflections coefficients on the slab width has a resonant character featuring strong amplification of the reflected and transmitted waves with negative angles. In the dependence of the scattering data on the gain-and-loss intensity we also observed strong resonances in the vicinity of the $\PT$-symmetry breaking point. In this resonance the slab strongly amplifies waves reflected and transmitted with negative angles, provided the incident wave has a positive angle of incidence.