It is shown that slow Bragg soliton solutions are possible in nonlinear complex parity-time (PT) symmetric periodic structures. Analysis indicates that the PT-symmetric component of the periodic optical refractive index can modify the grating band structure and hence the effective coupling between the forward and backward waves. Starting from a classical modified massive Thirring model, solitary wave solutions are obtained in closed form. The basic properties of these slow solitary waves and their dependence on their respective PT-symmetric gain-loss profile are then explored via numerical simulations.
|Journal||Physical Review A - Atomic, Molecular, and Optical Physics|
|Publication status||Published - Sep 4 2012|
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics