Enlargement of bandgap in 1-D photonic crystal heterostructures

Photonic crystal heterostructures form a natural extension to the analogy between semiconductors and photonic crystals-an analogy which substantially motivated research in photonic band-gap materials. Semiconductor heterostructures are made by combining at least two materials that have distinct band structures. In this paper, a heterostructure is proposed which is a combination of a Fibonacci quasi-periodic structure and a periodic structure. The combined structure has a large omnidirectional reflection range. The condition is that the omnidirectional reflection range of the two sub structures should be adjacent to each other.