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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 2 — Jan. 19, 2009
  • pp: 688–696

Mechanism of the large polarization rotation effect in the all-dielectric artificially chiral nanogratings

Benfeng Bai, Kuniaki Konishi, Xiangfeng Meng, Petri Karvinen, Anni Lehmuskero, Makoto Kuwata-Gonokami, Yuri Svirko, and Jari Turunen  »View Author Affiliations


Optics Express, Vol. 17, Issue 2, pp. 688-696 (2009)
http://dx.doi.org/10.1364/OE.17.000688


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Abstract

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-Pérot 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.

© 2009 Optical Society of America

OCIS Codes
(260.5430) Physical optics : Polarization
(050.5745) Diffraction and gratings : Resonance domain

ToC Category:
Physical Optics

History
Original Manuscript: August 19, 2008
Revised Manuscript: October 12, 2008
Manuscript Accepted: October 14, 2008
Published: January 8, 2009

Citation
Benfeng Bai, Kuniaki Konishi, Xiangfeng Meng, Petri Karvinen, Anni Lehmuskero, Makoto Kuwata-Gonokami, Yuri Svirko, and Jari Turunen, "Mechanism of the large polarization rotation effect in the all-dielectric artificially chiral nanogratings," Opt. Express 17, 688-696 (2009)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-17-2-688


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