Enhanced nonreciprocal transmission through a saturable cubic-quintic nonlinear dimer defect
arXiv:1901.05224 · doi:10.1038/s41598-019-38872-5
Abstract
The transmission properties through a saturable cubic-quintic nonlinear defect attached to lateral linear chains is investigated. Particular attention is directed to the possible non-reciprocal diode-like transmission when the parity-symmetry of the defect is broken. Distinct cases of parity breaking are considered including asymmetric linear and nonlinear responses. The spectrum of the transmission coefficient is analytically computed and the influence of the degree of saturation analyzed in detail. The transmission of Gaussian wave-packets is also numerically investigated. Our results unveil that spectral regions with high transmission and enhanced diode-like operation can be achieved.
arXiv comment10 pages, to appear in Scientific Reports
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