Design Of Optic Filter Of Two-Dimension Photonic Crystal

With the continuous improvement of the integration of semiconductor chip, some parameters of semiconductor chip, for example groove width, is gradually approaching its physical limit, which will seriously affect the accuracy and stability of the electronic communication. Such reasons limit the semiconductor materials in the future application of information technology. this is the so-called "electronic bottleneck". Compared to electronic communications, photon communication does not have those limits. So scientific workers put forward that, the photonic integrated devices is introduced in the information processing technology, as one of the important backup plan as an alternative to electronic communications. In1987, the concept of photonic crystal was first advanced. It has been widely studied because of small volume, excellent performance, as well as the unique advantages of the control light, and attracted a lot of researchers into the study of the theory and applications. Based on two-dimension photonic crystals in this paper, its basic characteristics and the design methods of optical device are in-depth study.First of all, the development history and the research status at home and abroad of photonic crystal are summarized in this paper. Then the basic characteristics and research methods of photonic crystal are analyzed in detail. On this basis, a good foundation about photonic crystal is provided.Secondly, in order to study the properties of the photonic crystal more convenient and accurately, PhCSS is designed, which is the specific photonic crystal simulation software. PhCSS integrates two electromagnetic numerical algorithms, FDTD and PWE. The unique advantage of this software is that, designing a new method to describe the structure of photonic crystal (one-dimensional and two-dimensional). It has a variety function, to meet the needs of this follow-up study on characteristics of photonic crystals.Third, Two kinds of filter with ring cavity and points microcavity respectively as frequency selective structure are designed, and these filters are analyzed in the simulation. Results show that, the ring cavity as the structure of the frequency selective has good transmission efficiency, but the resolution is poor; and improved point microcavity as the structure of the frequency selective has good transmission efficiency, at same time has the very high resolution and high coupling efficiency. These provide certain theoretical guidance for the preparation of photonic crystal filter.Finally, focusing the research on two-dimensional photonic crystal with point-defect, some performance, such as slow light efficiency and energy loss when microcavity interval changes, is simulated and calculated. Then design two slowly photonic crystal structure, and two characteristics of efficiency of slow light and energy loss of those structures are studied. The simulation results show that, compared to typical slow light structure of point defect array waveguide of two dimension photonic crystal, first structure can improve the efficiency of slow light, second structure can reduce the energy loss.