Abstract
Dielectric multilayers can usually serve as perfect reflectors, so most researches are performed to broaden the optical band of the total reflexion. In this work, a new examination had been carried out to create a multilayer which acts as an antireflection system. It has been shown that applying an apodization to a one dimensional photonic crystal can significantly enhance the total optical transmission in the structure. The transmission characteristics of the apodized grating are analysed. So, in order to achieve a wideband of total transmission the number of layers, apodization profile and the reference wavelength should be optimized. The enhancement of optical transmission in this structure is very important since the performance of a number of optical devices could be improved.