Tunable photonic defect modes in a cholesteric liquid crystal induced by optical deformation of helix
Tunable photonic defect modes in a cholesteric liquid crystal induced by optical deformation of helix
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DOI：
10.1103/physreve.69.061715
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发表时间：
2004-06-01
影响因子：
2.4
通讯作者：
Yoshino, K
中科院分区：
文献类型：
--
作者：
Matsui, T;Ozaki, M;Yoshino, K
我们已经证明，基于数值分析，光子缺陷模的引入和调谐的液晶（CLC）可以实现其一维周期性螺旋结构的局部变形。只有当入射的圆偏振光具有与CLC相同的旋向性时，透射谱中才会出现缺陷模。缺陷模位置的调谐可以在螺旋线的局部伸长和缩短两者上执行;然而，缺陷模波长的移位的方向是相反的。通过控制螺旋线的变形程度，可以实现缺陷模的连续移动。我们的研究结果将为CLC中缺陷模的光学引入和调谐开辟道路。
We have demonstrated, based on numerical analyses, that the introduction and tuning of photonic defect modes in a cholesteric liquid crystal (CLC) can be realized by the local deformation of its one-dimensional periodic helical structure. The defect modes appear in transmission spectra only when incident circularly polarized light has the same handedness as CLC's. The tuning of defect modes position can be performed upon both local elongation and shortening of the helix; however, the direction of the shift of the defect mode wavelength is opposite. By controlling the degree of the deformation of helix, a continuous shift of the defect modes can be realized. Our results will open the way for the optical introduction and tuning of defect modes in CLC's.