Journal
OPTICS EXPRESS
Volume 17, Issue 2, Pages 688-696Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.17.000688
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Funding
- Academy of Finland [209806, 129155, 115781, 118951]
- Network of Excellence in Micro-optics
- Japan Society for the Promotion of Science
- Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan
- Academy of Finland (AKA) [115781, 115781] Funding Source: Academy of Finland (AKA)
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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
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