Switchable Zero-Order Diffraction Filters Using Fine-Pitch Phase Gratings Filled with Liquid Crystals.

• Sakata Hajime

  Canon Research Center, 5-1 Morinosato-Wakamiya, Atsugi, Kanagawa 243-0193, Japan

• Nishimura Michiyo

  Canon Research Center, 5-1 Morinosato-Wakamiya, Atsugi, Kanagawa 243-0193, Japan

抄録

Zero-order transmission efficiency is controlled using electrically switchable liquid crystals confined in periodic fine grooves. Trapezoidal grating profiles are designed in order to improve the extinction ratio. Using the index matching and mismatching conditions of liquid crystals with the grating grooves, we achieve a transparent window for the entire visible range in the matching state, and a dark color filter in the mismatching state. Spectral transmittance is changed through the frequency-dependent anisotropic permittivity of the liquid crystal. Polarization-insensitive operation is performed using a two-stack device with crossed grating directions.

収録刊行物

• Japanese Journal of Applied Physics

  Japanese Journal of Applied Physics 39 (3B), 1516-1521, 2000

  The Japan Society of Applied Physics

キーワード

• diffraction grating
• liquid crystal
• zero-order diffraction
• optical filter
• light valve

詳細情報

• CRID: 1390282681230724480
• NII論文ID: 110003908489
• NII論文ID: 30021834100
• NII論文ID: 210000046876
• NII論文ID: 130004527150
• NII書誌ID: AA10457675
• DOI: 10.1143/jjap.39.1516
• ISSN: 13474065
• ISSN: 00214922
• NDL書誌ID: 5344641
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I5344641
• Web Site: https://iopscience.iop.org/article/10.1143/JJAP.39.1516
• Web Site: https://iopscience.iop.org/article/10.1143/JJAP.39.1516/pdf
• 本文言語コード: en
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