Unidirectional Nonlinear PT-symmetric Optical Structures

TL;DR

This paper demonstrates that nonlinear optical structures with balanced gain and loss, exploiting PT symmetry and nonlinear effects, can function as unidirectional optical valves, with the dynamics shown in an integrable PT-symmetric system.

Contribution

It introduces a new approach to achieve unidirectional optical control using PT-symmetric nonlinear structures, highlighting their potential for optical device applications.

Findings

Balanced gain-loss profiles enable unidirectional optical flow.

PT symmetry combined with nonlinearity creates novel unidirectional dynamics.

Demonstrated in an integrable PT-symmetric nonlinear system.

Abstract

We show that non-linear optical structures involving a balanced gain-loss profile, can act as unidirectional optical valves. This is made possible by exploiting the interplay between the fundamental symmetries of parity (P) and time (T), with optical nonlinear effects. This novel unidirectional dynamics is specifically demonstrated for the case of an integrable PT-symmetric nonlinear system.