نتایج جستجو برای: dimensional photonic crystals
تعداد نتایج: 467549 فیلتر نتایج به سال:
Self-assembled colloidal crystals have attracted major attention because of their potential as low-cost three-dimensional (3D) photonic crystals. Although a high degree of perfection is crucial for the properties of these materials, little is known about their exact structure and internal defects. In this study, we use tomographic scanning transmission X-ray microscopy (STXM) to access the inte...
We study theoretically the band-gap structures of several types of three-dimensional photonic crystals with the fcc lattice symmetry: synthetic opals, inverted yablonovite and woodpile. The samples of inverted yablonovite, inverted yablonovite with a glassy superstructure and woodpile are fabricated by two-photon polymerization through a direct laser writing technique, which allows the creation...
We have proposed a novel three-dimensional (3D) photonic crystal laser. The electromagnetic field, radiation power density, and lifetime of spontaneous emission of the laser were calculated by a plane-wave method. When a defect layer is introduced into the crystal, spontaneous emission radiates only in the lasing direction. The radiation angle is as sharp as that of a conventional surface-emitt...
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