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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Vol. 15, Iss. 6 — Jun. 1, 1998
  • pp: 1577–1585

Effective medium theory of two-dimensional subwavelength gratings in the non-quasi-static limit

Hisao Kikuta, Yasushi Ohira, Hayao Kubo, and Koichi Iwata  »View Author Affiliations


JOSA A, Vol. 15, Issue 6, pp. 1577-1585 (1998)
http://dx.doi.org/10.1364/JOSAA.15.001577


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Abstract

Effective medium theory is useful for designing optical elements with a form-birefringent subwavelength structure. We describe a way to determine the effective refractive indices and the directions of their principal axes for two-dimensional (2-D) subwavelength gratings in the normal incidence case. The effective indices and the directions are calculated from finite coupled-coefficient equations that are used in 2-D rigorous coupled-wave analysis. We use the effective medium theory to calculate transmittance of several kinds of 2-D periodic subwavelength gratings. These results are compared with results of rigorous grating analysis to confirm the predictions of the effective medium theory for 2-D subwavelength gratings.

© 1998 Optical Society of America

OCIS Codes
(050.2770) Diffraction and gratings : Gratings
(160.1190) Materials : Anisotropic optical materials
(230.3990) Optical devices : Micro-optical devices
(230.5440) Optical devices : Polarization-selective devices

History
Original Manuscript: August 11, 1997
Revised Manuscript: January 5, 1998
Manuscript Accepted: January 14, 1998
Published: June 1, 1998

Citation
Hisao Kikuta, Yasushi Ohira, Hayao Kubo, and Koichi Iwata, "Effective medium theory of two-dimensional subwavelength gratings in the non-quasi-static limit," J. Opt. Soc. Am. A 15, 1577-1585 (1998)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-15-6-1577


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