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Research And Design Of Photonic Crystal Microcavity

Posted on:2014-02-14Degree:MasterType:Thesis
Country:ChinaCandidate:X GuoFull Text:PDF
GTID:2248330398472422Subject:Physical Electronics
Abstract/Summary:PDF Full Text Request
Due to the good performance of controlling lights, many applications of photonic crystals have gained much attention of researchers. Photonic crystal microcavity is one of them. Photonic crystal microcavity shackles of the light field, which has a high quality factor. Study how to design a good photonic crystal microcavity has important implications for the future production of photonic crystal devices. In this paper, plane wave expansion method is used to study the band structure of the photonic crystal slab and FDTD is used to calculate the quality factor of photonic crystal microcavity. The main content of this paper is as follows:Through simulation and theoretical analysis, the influence of an increasing kz component to the band structure and band-gap of two dimensional photonic crystal slabs was discussed. The impact of this influence on the design of two-dimensional photonic crystal cavity was analyzed.Q factor and resonant frequency of two dimensional photonic crystal slabs with different aspect ratio of the rectangular air holes were studied. According to the results, two dimensional photonic crystal slab with square air holes got the higher Q value. Then the influence of square air holes’side length and rotation angle to Q factor and resonant frequency of two dimensional photonic crystal slab was discussed. Based on these results, a square defects and a rhombus defects two-dimensional photonic ciystal cavity of square air holes were designed and optimized.To both cases of L3square air holes photonic crystal cavity with the triangular lattice and square lattice, Q value and resonant frequency were discussed. The influence of square air holes’ side length and rotation angle to Q factor and resonant frequency of L3square air holes photonic crystal cavity with the triangular lattice and square lattice were calculated. Based on these results, L3square air holes photonic crystal cavity with the triangular lattice and square lattice were both designed an optimized.
Keywords/Search Tags:photonic crystal cavity, band structure, qualityfactor, resonant frequency
PDF Full Text Request
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