Nonlocal gap solitons in parity-time symmetric optical lattices
  We numerically study the nonlocal gap solitons in parity-time (PT) symmetric optical lattices built into a nonlocal self-focusing medium. We state the existence, stability, and propagation dynamics of such PT gap solitons in detail. Simulated results show that there exist stable gap soltions. The influences of the degree of nonlocality on the soliton power, the energy flow density and the stable region of the PT gap solitons are also examined. 
Huagang Li, Xiujuan Jiang, Xing Zhu and Zhiwei Shi
physics.optics