Numerical Analysis of Dual-wavelength Photonic Crystal Slab Microcavities

• Main Authors: Shih-Yu Tsai, 蔡世宇
• Other Authors: Chih-Chung Yang
• Format: Others
• Language: en_US
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/88794831388436046238

碩士 === 國立臺灣大學 === 光電工程學研究所 === 92 === In this thesis, the radiation characteristics of dual-wavelength photonic crystal slab microcavities are numerically investigated. Such devices with dual wavelengths corresponding to blue and yellow light can provide white light for lighting purpose. The finite-difference time-domain method is the simulation tool throughout this thesis. In the design of dual-wavelength photonic crystal microcavity, we first look for the appropriate form of microcavity that including two resonant modes close to complementary colors (blue and yellow). Then, we investigate the dependence of radiation characteristics on the sizes and locations of air holes around the microcavity. By varying the geometry of the microcaviy, the two resonant frequencies can be further separated in the spectrum. The radiation characteristics of dual-wavelength photonic crystal slab coupled microcavities are also studied. It has more flexibility to design this dual-wavelength coupled-microcavity device since the radiation characteristics of each microcavity can be individually modified by the neighboring holes. Photonic crystal slab microcavities can be used to improve the efficiency of light extraction from the dielectric slab. Such a passive structure can be incorporated with an active light-emitting semiconductor to yield a good white light source.