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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. 19, Iss. 7 — Jul. 1, 2002
  • pp: 1346–1351

Guided-mode resonant grating filter with an antireflection structured surface

Akio Mizutani, Hisao Kikuta, Koichi Iwata, and Hiroshi Toyota  »View Author Affiliations


JOSA A, Vol. 19, Issue 7, pp. 1346-1351 (2002)
http://dx.doi.org/10.1364/JOSAA.19.001346


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Abstract

We describe a new structure of guided-mode resonant grating (GMRG) filters with low sideband reflectance. This GMRG filter consists of a high-index thin film on an antireflective structured surface called “moth-eye structure.” Since the high-index film undulates along the surface structure, the film acts as a modulated optical waveguide. An incident light wave satisfying a resonant condition is reflected by the GMRG filter, and nonresonant light waves pass through the filter. This GMRG filter is valid for reducing reflection of nonresonant light waves in a wide spectral range. The resonant reflection of this new filter was investigated by numerical calculation based on an electromagnetic grating analysis. In the case of a triangular antireflective surface structure whose thickness is 2× greater than its period, the sideband reflectance for nonresonant light waves was lower than 0.5% for TM-polarized light in a wide range of wavelengths.

© 2002 Optical Society of America

OCIS Codes
(050.2770) Diffraction and gratings : Gratings

Citation
Akio Mizutani, Hisao Kikuta, Koichi Iwata, and Hiroshi Toyota, "Guided-mode resonant grating filter with an antireflection structured surface," J. Opt. Soc. Am. A 19, 1346-1351 (2002)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-19-7-1346


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