Mechanism of the large polarization rotation effect in the all-dielectric artificially chiral nanogratings
Mechanism of the large polarization rotation effect in the all-dielectric artificially chiral nanogratings
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DOI：
10.1364/oe.17.000688
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发表时间：
2009-01-19
期刊：
影响因子：
3.8
通讯作者：
Turunen, Jari
中科院分区：
文献类型：
--
作者：
Bai, Benfeng;Konishi, Kuniaki;Turunen, Jari
通过实验和数值分析，探讨了全电介质人工手性纳米级直接传输中大偏振旋转效应的物理机制。结果表明，正常入射光的左、右圆偏振分量与漏导模或法布里-珀罗共振模的不同耦合导致圆二向色性增强，从而产生巨大的偏振旋转效应。模式分布和局域场计算直观地展示了共振时不同耦合性能的图像。(C)2008年美国光学学会
The physical mechanism of the large polarization rotation effect in direct transmission of the all-dielectric artificially chiral nanogratings is explored by experiment and numerical analysis. It is shown that the different coupling of right-and left-circularly polarized components of the normally incident light to the leaky guided modes or Fabry-Perot resonance modes lead to the enhanced circular dichroism, resulting in the giant polarization rotation effect. The mode profile and local field calculations demonstrate intuitive images of the different coupling performance at resonances. (C) 2008 Optical Society of America