4.6 Article

Improvement of diffraction efficiency of dielectric transmission gratings using anti-reflection coatings

Journal

OPTICS EXPRESS
Volume 21, Issue 16, Pages 18640-18645

Publisher

OPTICAL SOC AMER
DOI: 10.1364/OE.21.018640

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Funding

  1. Photon Frontier Network
  2. MEXT

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A novel method for increasing diffraction efficiency of transmission gratings is proposed. In this method, dielectric multilayers are inserted between a grating region and a substrate. These multilayers work as an anti-reflection coating for the transmission grating. It is presented that a grating with 1740 grooves/mm has the diffraction efficiency over 99% using this anti-reflection coating. (c) 2013 Optical Society of America

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