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Optics Letters

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  • Vol. 30, Iss. 13 — Jul. 1, 2005
  • pp: 1617–1619

Area-coded effective medium structures, a new type of grating design

Bernd H. Kleemann, Johannes Ruoff, and Ralf Arnold  »View Author Affiliations


Optics Letters, Vol. 30, Issue 13, pp. 1617-1619 (2005)
http://dx.doi.org/10.1364/OL.30.001617


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Abstract

We propose a new way to design gratings with desired diffraction properties by using subwavelength feature sizes perpendicular to the ordinary superwavelength grating period. This is different from well-known one-dimensional binary-blazed gratings that use a structuring along the grating period and thus opens new flexibility in generating arbitrary effective-index distributions in the direction of the grating period. Since the subwavelength features form contiguous areas, they are called area-coded effective medium structures (ACES). Compared with well-known binary subwavelength structures in two-dimensional arrangements consisting of pillars, ACES are more stable and have comparable efficiency properties. As an example we show how to design in principle a four-level area-coded effective medium grating, compare the efficiency of ACES with binary-blazed and ├ęchelette gratings, and optimize the subwavelength period of ACES.

© 2005 Optical Society of America

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(050.1960) Diffraction and gratings : Diffraction theory
(050.1970) Diffraction and gratings : Diffractive optics

Citation
Bernd H. Kleemann, Johannes Ruoff, and Ralf Arnold, "Area-coded effective medium structures, a new type of grating design," Opt. Lett. 30, 1617-1619 (2005)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-30-13-1617


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