Abstract
Three-dimensional photonic crystals with complete photonic bandgap operating at mid-infrared to optical communication wavelengths are developed. The crystal is constructed by stacking semiconductor/air stripes utilizing wafer-fusion and very precise alignment technique based on laser beam diffraction pattern observation. The complete bandgap is observed and the bandgap effect larger than 40 dB is successfully achieved. Photonic crystal waveguide with sharp bend is designed and developed as an important step to realize ultra-small optical integrated circuits.
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