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四束激光从空气直接入射到平面结构的感光树脂所制备的面心立方结构实际上是一种不但晶格沿[111]方向拉伸,而且其格点也在[111]方向被拉长的变形面心立方结构。在对这种变形面心立方结构的光子晶体的晶格形状及能带分布的研究中,通过利用麻省理工学院的光子晶体能带计算程序计算了各种参量对此变形面心立方结构的蛋白石和反蛋白石的能带分布的影响,发现在一定条件下该结构的蛋白石会出现完全光子带隙。用激光全息聚合法在正胶的环氧树脂中可制作反蛋白石模板,若用此模板制作硅蛋白石,当晶格沿[111]方向拉伸2.1倍和硅的占空比为13.7%时出现最大的带隙宽度。此最大带隙宽度的结构的制作光路是三角锥形光路,对称地环绕中央光束的三束外围激光束之间夹角为54.0°,三束外围激光束与中央激光束夹角为31.6°。
The face-centered cubic structure prepared by directing the four laser beams from the air onto the planar structure of the photosensitive resin is actually a kind of surface-centered cubic structure in which not only the lattice is stretched in the [111] direction but also the lattice point is also elongated in [111] Deformation face center cubic structure. In the study of the lattice shape and energy band distribution of photonic crystals with the deformed face-centered cubic structure, various parameters of the deformed face-centered cubic structure were calculated by using the MIT band calculation program Opal and anti-opal band distribution, we found that the opal bandgap of this structure will appear under certain conditions. Laser holographic polymerization in the positive epoxy resin can be prepared anti-opal template, if the use of this template production of silica opal, when the lattice along the [111] direction 2.1 times the stretching and silicon when the duty cycle was 13.7% The largest band gap width. The optical path of the structure with the maximum band gap is a triangular pyramidal optical path. The angle between the three peripheral laser beams symmetrically surrounding the central beam is 54.0 °, and the angle between the three peripheral laser beams and the central laser beam is 31.6 °.