Abstract
We investigate mixed-gap vector solitons involving incoherently coupled fundamental and dipole components in a parity-time symmetric lattice with nonlocal focusing nonlinearity. The fundamental component exists in the semi-infinite gap with propagation constant μ1 and the dipole component exists in the first gap with propagation constant μ2. We find that the width of the existence domain on μ1 (μ2) for vector solitons shrinks with the growth of nonlocality degree d and expands almost linearly with the increase of μ2 (μ1). In particular, linear stability analyses show that this type of vector solitons are unstable in the high-power region of the dipole component.
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