Target decoupling in a coupled optical system resistant to random perturbation

TL;DR

This paper introduces a macroscopic inverse design method to achieve stable, disorder-resistant decoupling of optical elements, enabling targeted light control without detailed microscopic manipulation.

Contribution

The authors develop a macroscopic inverse design approach for target decoupling in coupled optical systems, overcoming limitations of cloaking methods and disorder effects.

Findings

Achieved stable decoupling independent of random perturbations.

Demonstrated decoupling in disordered systems overcoming Anderson localization.

Enabled coherent, scattering-free wave transport with desired profiles.

Abstract

To suppress unwanted crosstalks between nearby optical elements, the decoupling technique for integrated systems has been desired for the target control of light flows. Although cloaking methods have enabled complete decoupling of optical elements by manipulating electromagnetic waves microscopically, it is neither feasible nor necessary to control each unit element in coupled systems when considering severe restrictions on material parameters for cloaking. Here we develop the macroscopic approach to design crosstalk-free regions in coupled optical systems. By inversely designing the eigenstate which encompasses target elements, the stable decoupling of the elements from the coupled system is achieved, being completely independent from the random alteration of the decoupled region, and at the same time, allowing coherent and scattering-free wave transport with desired spatial profiles. We also demonstrate the decoupling in disordered systems, overcoming the transport blockade from Anderson localization. Our results provide an attractive solution for 'target hiding' of elements inside coupled systems.