Realization of optical coupling based on semi-circular photonic crystals

In this paper, a new structure used to realize optical coupling is proposed. This structure is made up of half of a two-dimensional circular photonic crystal and a photonic crystal waveguide. It is shown that the peak value of the transmissivity shifts by choosing appropriate parameters of SCPC. This structure has great potential in optical integration and other areas. (C) 2014 Elsevier GmbH. All rights reserved.