Adiabatic light propagation in nonlinear waveguide couplers with longitudinally varying detunings via resonance-locked inverse engineering

TL;DR

This paper demonstrates how to control light propagation in nonlinear waveguide couplers using resonance-locked inverse engineering, enabling adiabatic light transfer, splitting, and returning even in nonlinear regimes for high-fidelity optical devices.

Contribution

It introduces a novel method employing resonance-locked inverse engineering to achieve adiabatic light control in nonlinear waveguides with varying detunings.

Findings

Achieves complete light transfer, splitting, and return adiabatically.

Eliminates nonlinear effects to prevent non-adiabatic oscillations.

Enables high-fidelity all-optical nonlinear device operation.

Abstract

We investigate the adiabatic evolution of light in nonlinear waveguide couplers via resonance-locked inverse engineering based on stimulated Raman adiabatic passage (STIRAP). The longitudinal varying detunings of the propagation coefficients are designed to eliminate dynamically the nonlinear effect, which induce the non-adiabatic oscillations. We show that different light evolutions such as complete light transfer, light split and light return can be realized adiabatically with appropriate choices of the detunings even in the nonlinear regime. The features open new opportunities for the realization of all-optical nonlinear devices with high fidelity in integrated optics.