Study On The Transmission Characteristics Of One-Dimensional Photonic Crystal

Photonic crystal is a new type of artificial materials with characteristic of photonic band gap (PBG) structure. One-dimensional photonic crystal is a kind of periodic medium reflector that has very high reflectivity in the whole range of incident angle within a given wave band, which is the band gap of the one-dimensional photonic crystal. Because photonic crystal can control the flow of photons, It has been widely used in the fields of optical communication, microwave communication. It has become one of the most important topics of the world.The summary of the dissertation is as follows:1. The historical background, the physical foundation and the main properties of photonic crystals are introduced in chapter I. Different design methods and different theoretical research methods are also compared in this chapter. Finally, possible utilization and main research fields in photonic crystal are listed so that we can set the aim of the present thesis.2. We derived the basic differential equation of light spreading in photonic crystal and the theory of one-dimensional optical transfer matrix from the Maxwell's equation in chapter II .This theory has small calculation quantity and high precision in calculation and can calculate the band gap properties of photonic crystals.3. The characters of band structure in one-dimensional photonic crystals containing negative refraction materials are discussed in chapter HI. The result shows that the transmission bands varying with the number of period of the photonic crystal containing negative refraction materials, and the angular property is further studied.4. The optical transmission properties of one-dimensional photonic crystals composed of ferromagnetic materials are studied by transfer matrix method. The band gap of photonic crystals composed of ferromagnetic materials is found increasing nonlinearly with the thickness of dielectric layer. By adjusting the thickness of dielectric layer properly, photonic crystals with broader band gap can be made, which will provide theoretical support for multi-channel narrow pass band filtering.