Studies Of Two-Dimensional Photonic Crystals Based On Energy Band Structure

Photonic crystals (PCs) are new optical materials having photonic band-gap (PBG).They have a bright future for application cause of new performance; therefore they will be probably crucial materials in future information age. Photonic crystals are divided into one-dimensional (1D), two-dimensional (2D) and three-dimensional (3D) photonic crystals according to spatial periodity of dielectrics. 2D PCs have characteristic performances, and can be easier made, so we concentrate ourselves on 2D PCs.2D PCs were studied by two different methods in this paper. Band structures of PCs with basic lattice type were calculated using plane wave method (PWM), and its results suggested that 2D PCs with different lattice type have different effects on incident light.We also used transfer matrix method (TMM) since shortcomings of PWM. Transmission spectrums were calculated using Translight software written by British Andrew L.Reynolds based on TMM. We compared them with results of PWM and experiments respectively, and found that they agreed well. Furthermore, we studied how defect layers and incident angle effected on transmission light.Results of the paper will guide us how to design 2D PC devices.