Discrete solitons and scattering of lattice waves in guiding arrays with a nonlinear $\mathcal{P}\mathcal{T}$-symmetric defect

Xiangyu Zhang, Jinglei Chai, Jiasheng Huang +3

Discrete fundamental and dipole solitons are constructed, in an exact analytical form, in an array of linear waveguides with an embedded $\mathcal{P}\mathcal{T}$-symmetric dimer, which is co…