聚合物膨胀光子晶体的带隙调谐

W. Monch, P. Waibel, H. Zappe
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摘要

聚合物膨胀是光子晶体带隙调谐的一种新方法。交联聚合物在溶剂的存在下膨胀,从而增加了它们的体积并改变了它们的折射率。因此,聚合物PC的晶格常数和折射率会因膨胀而改变,并导致光学带隙的移位。本文介绍了一维pc膨胀的实验研究和三维pc膨胀的理论计算。结果表明,在80%的溶剂饱和压力下,暴露于溶剂-氮气混合物中,聚合物PC的光学带隙频率偏移约10%。
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Bandgap tuning of photonic crystals by polymer swelling
Polymer swelling is studied as a novel method for bandgap tuning of photonic crystals (PCs). Crosslinked polymers swell in the presence of solvents, thereby increasing their volume and changing their refractive index. Consequently, the lattice constant and the refractive index of a polymer PC is modified by swelling and leads to a shift of the optical bandgap.We present experimental studies of swelling of one-dimensional PCs and theoretical calculations of swelling of three-dimensional PCs. It is shown that the frequencies of the optical bandgap of a polymer PC is shifted by about 10% when exposed to a solvent-nitrogen gas mixture at 80% of the solvent saturation pressure.
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