On chip optical signal routing based on self-collimation effect in two-dimensional photonic crystals

A non defect waveguide based on self-collimation effect in two-dimensional photonic crystals is presented in this paper. An investigation to determine self-collimation frequency range in square and hexagonal lattice photonic crystals is realized. It is demonstrated the routing of two self-collimated Gaussian beams travelling through a hexagonal photonic crystal, on the same optical layer. Using the unique advantage of allowing self-collimated beams to cross each other without coupling, one can devise structureless interconnects for photonic integrated circuits.