Research On Properties Of The One-dimensional Photonic Crystals With Heterogeneous-single-symmetric Cycle

When the pursuit of efficient and miniaturizational electronic integrated circuits, at the same time, the difficulty of production and signal transmission speed have reached its limitation. In this case the concept of photonic crystals should be shipped out. Since then, the photonic crystal has got widespread attention by the researchers. Various types of photonic crystal devices gradually replaced the semiconductor device, become the basis for the new-light-information age. In this background, the author has widely consulted the related literature of one dimensional photonic crystals, the concept of photonic crystal, the preparation process and the theoretical research methods.. Finally, the transfer matrix method is selected and the new design of the photonic crystal model is simulated by the Matlab software. The research work in this paper is:(1)To design a one-dimensional heterogeneous single period symmetric photonic crystal model, the model consisting of two kinds of materials: Ti O2(n1=2.29) and Si O2(n2=1.45).And Matlab software was used to simulate the band gap spectrum, On the basis of this, the incident angle of incident light, the period number of the medium layer and the ratio of the thickness of the two materials are changed, to observe the changes of the band gap of the line.It is found that the band gap spectrum of photonic crystal is sensitive to the incident angle of the incident light and the ratio of the thickness, but not sensitive to the cycle number of the medium layer. This result can be applied in the study of photonic crystal sensors.(2)The defect layer is added to the one-dimensional heterogeneous single period symmetric photonic crystal, And the Matlab software is used to simulate the photonic band gap of the photonic crystal after adding the defect layer. The simulation results are compared with the band gap spectral lines without defect layer, and the position and number of defect modes are observed. Change the position of the defect, thickness of the defect, incident angle of the incident light and the thickness of the medium layer, and explain phenomena related to physical reasons. This study provides a theoretical basis for the fabrication of photonic crystal filters.