Impact of nonlocal response on propagation of surface plasmon polarition in anisotropic insulator/metal/insulator structures

We discuss the effects of nonlocality on the characteristics of surface plasmon polarition (SPP) in anisotropic insulator/metal/insulator structures by using the hydrodynamic model. The differences of the dispersion relation and the propagation length of the SPP between nonlocal and local case, are derived and numerically solved. The dependence of propagation length on the angle of rotation of the crystal axes is investigated and an effective method for altering the propagation length is provided.