Switching dynamics in parity-time symmetric coupler with nonlocal nonlinearity having transverse potentials

Abstract

ABSTRACTIn this work, we study the switching dynamics in symmetric coupler with nonlocal nonlinearity having transverse periodic and aperiodic potentials. The nonlinear switching of the symmetric nonlocal coupler has been explored by varying the input power, the range of the nonlocal nonlinearity and the strength of the transverse potential. The power-dependent switching reveals that the power oscillates between the channels for low input intensity, whereas the power get trapped in the gain channel for high input intensity, in the case of weak nonlocality and low strength of the transverse potentials. The critical power increases with the range of the nonlocality, the strength of the transverse potential and the gain/loss coefficient. The switching from gain channel to lossy channel is possible for high input power by varying either the range of the nonlocality or the strength of the transverse periodic potential.