Parity-time (PT) symmetric Double-lambda optical quadrimer waveguides in linear and nonlinear regimes

Samit Kumar Gupta, Jyoti Prasad Deka, Amarendra K. Sarma

We report a study on a closed-form optical quadrimer waveguides system. We have studied the beam dynamics of the system below, at and above the PT-threshold in both the linear and nonlinear regimes. We have also explored the effects of gain/loss parameter and the strength as well as the nature of the nonlinearity (i.e. focusing or defocusing) upon the evolution of optical intensity in each of the four sites. We observe saturation behaviors in the spatial power evolution, when nonlinearity is incorporated into the system, in the gain-guides, a feature that could be exploited for various practical applications.
Optics (physics.optics)

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