Abstract

We theoretically demonstrate soliton steering in parity–time ($\mathcal{PT}$)-symmetric coupled nonlinear dimers. We show that if the length of the $\mathcal{PT}$-symmetric system is set to $2\pi$, contrary to the conventional one that operates satisfactorily well only at the half-beat coupling length, the $\mathcal{PT}$ dimer remarkably yields an ideal soliton switch exhibiting almost 99.99% energy efficiency with an ultralow critical power.

© 2019 Optical Society of America

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