Coherent perfect absorber and laser for nonlinear waves in optical waveguide arrays
Coherent perfect absorber and laser for nonlinear waves in optical waveguide arrays
A localized non-Hermitian potential can operate as a coherent perfect absorber or as a laser for nonlinear waves. The effect is illustrated for an array of optical waveguides, with the central waveguide being either active or absorbing. The arrays situated to the left and to the right of the center …