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A tunable three layer phase mask for single laser exposure 3D photonic crystal generations: bandgap simulation and holographic fabrication

机译:适用于单次激光曝光3D光子晶体世代的可调三层相位掩模:带隙模拟和全息制造

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Through the use of a multi-layer phase mask to produce five-beam interference, three-dimensional photonic crystals can be formed through single exposure to a photoresist. In these holographically formed structures, the interconnectivity is controlled by the relative phase difference among contributing beams. Photonic band gaps are calculated and the simulation shows a maximum bandgap of 18% of the middle gap frequency when the phase difference is optimized. A three-layer phase mask is fabricated by placing a spacer layer between two orthogonally-orientated gratings. The phase difference is controlled by thermal-tuning of the spacer thickness. Photonic crystal templates are holographically fabricated in a photosensitive polymer using the phase mask.
机译:通过使用多层相位掩模产生五光束干涉,可以通过单次暴露于光致抗蚀剂来形成三维光子晶体。在这些全息形成的结构中,互连性由贡献光束之间的相对相位差控制。计算了光子带隙,当相位差最优化时,仿真显示最大带隙为中间带隙频率的18%。通过在两个正交取向的光栅之间放置隔离层来制造三层相位掩模。通过间隔物厚度的热调节来控制相位差。使用相掩模在光敏聚合物中全息制造光子晶体模板。

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