Perturbative approach to diatomic lattices
arXiv:1207.6809 · doi:10.1142/S0219-7499(12)50072-4
Abstract
By using a small rotation approach, we show that it is possible to obtain well behaved perturbed solutions for the amplitude of the electromagnetic field propagating in a photonic waveguide array. This array mimics the propagation of a quasiparticle among the sites of an infinite one-dimensional chain.
7 pages, 4 figures