Xing Zhu

Nonlocal solitons in dual-periodic PT-symmetric optical lattices

We numerically study the nonlocal solitons in dual-periodic parity-time (

Nonlocal multihump solitons in parity-time symmetric periodic potentials

\mathcal{PT}

Nonlocal bright spatial solitons in defocusing Kerr media supported by \chem{\cal {PT}} symmetric potentials

) symmetric optical lattices built into a nonlocal self-focusing medium. We state the existence, stability, and propagation dynamics of such

Stable surface solitons in truncated complex potentials

\mathcal{PT}

Localized surface modes in parity–time-symmetric potentials

-gap solitons in detail. Simulated results show that there exist stable gap solitons. The energy flow density and the stable region of the

Mixed-gap vector solitons in parity-time-symmetric mixed linear–nonlinear optical lattices

\mathcal{PT}

Surface defect gap solitons in optical lattices with nonlocal nonlinearity

-gap solitons in both the propagation constant and the degree of nonlocality are also examined.

Lattice solitons in PT -symmetric mixed linear-nonlinear optical lattices

We report on the existence and stability of nonlocal multihump gap solitons in one-dimensional parity-time symmetric periodic potentials. They can exist in the first gap in defocusing nonlocal nonlinearity and in the semi-infinite gap in focusing nonlocal nonlinearity. These solitons can be stable in the defocusing nonlinearity but are unstable in the focusing nonlinearity. For the multihump solitons, the shapes of the nonlinear contribution to refractive index are also multihump. The stability and shapes of the intensity distribution of these solitons will be changed by the degree of nonlocality. We also study the transverse power flow of these solitons.

Solitons in PT–symmetric optical lattices with spatially periodic modulation of nonlinearity

The bright spatial solitons in nonlocal defocusing Kerr media with parity-time () symmetric potentials are studied. The influence of the degree of nonlocality on the solitons and the transverse energy flow within the stable solitons are examined. We also find that these solitons can exist and be stable over a different range of the propagation constant and potential parameters. Interestingly, there exists a threshold value for the degree of nonlocality or potential parameters.

Bright spatial solitons in defocusing Kerr media with PT-symmetric potentials

We show that surface solitons in the one-dimensional nonlinear Schrödinger equation with truncated complex periodic potential can be stabilized by linear homogeneous losses, which are necessary to balance gain in the near-surface channel arising from the imaginary part of potential. Such solitons become stable attractors when the strength of homogeneous losses acquires values from a limited interval and they exist in focusing and defocusing media. The domains of stability of the surface solitons shrink with an increase in the amplitude of the imaginary part of complex potential.