Blazed binary subwavelength gratings with efficiencies larger than those of conventional échelette gratings.

@article{Lalanne1998BlazedBS,
  title={Blazed binary subwavelength gratings with efficiencies larger than those of conventional {\'e}chelette gratings.},
  author={Ph Lalanne and Simion Astilean and Pierre Chavel and Edmond Cambril and Huguette Launois},
  journal={Optics letters},
  year={1998},
  volume={23 14},
  pages={
          1081-3
        }
}
We introduce a new structural cutoff beyond which subwavelength gratings cease to behave as homogeneous media and discuss its effects on the proper selection of the sampling periods of subwavelength diffractive elements. According to this analysis, a 3lambda-period blazed binary grating composed of square pillars is designed for He-Ne operation and is fabricated by etching of a TiO>(2) layer deposited upon a glass substrate. Its first-order measured diffraction efficiency is 12% larger than the… CONTINUE READING

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