Nonreciprocal wave transmission through discrete complex saturable Ginzburg–Landau dimer
Nano-optoelectronics Research Laboratory, Department of Physics, University of Agriculture Faisalabad, 38040, Faisalabad, Pakistan
Accepted: 29 December 2021
Published online: 13 January 2022
The asymmetric diode-like response of a dimer described by discrete Ginzburg–Landau equation with saturable nonlinearity is investigated. The lattice under probe is one dimensional and linked to linear side chains. The bands of the rectifying factor and transmission coefficient are thoroughly achieved by backward iteration map, employed to the set of DCGLEs. Specifically, interest is directed towards possible asymmetric transmission, controlled by the on-site and saturation nonlinearities with damping and amplification parameters. We demonstrate that the multistability with declared diodelike nonreciprocal transmission enhances and transferred to higher intensities of transmitted wave as the saturation effect increases. Moreover, the variation of linear damping with saturation has an opposite impact on bistable windows of transmission coefficient. The continuum of transmission is systematically computed, and the effect of the level of on-site potential and saturation analyzed in detail. The spectral regions of our results reveal the fact that high transmission and improved diode-effect can be achieved by controlling nonlinear parameters. Furthermore, we change the different site-dependent factors to analysis for regimes of an improved diode effect within this DCGL model.
© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2022