Determination of the insertion loss and refractive index anisotropy in nematic liquid crystal materials using a v-band waveguide transmission cell

Toshiaki Nose*, Michinori Honma, Tatsuo Nozokido, Koji Mizuno

*この論文の責任著者

研究成果: ジャーナルへの寄稿会議記事査読

10 被引用数 (Scopus)

抄録

Large electrooptic effects based on the reorientation of liquid crystal, molecules are expected in the high frequency electromagnetic wave region. However, there is only limited information about the optical and/or dielectric properties of the liquid crystal (LC) materials except for the visible and very low frequency region. Here, we try to determine the loss parameter and refractive index anisotropy of the commercially available nematic liquid crystal materials in the millimeter wave (MMW) region by using a V-band (50 GHz - 75 GHz) rectangular waveguide test cell Loss parameters are determined by fitting the theoretical data based on the multiple reflection phenomena to the measured transmission spectra. Refractive index anisotropy is derived from the phase difference between the horizontal and the vertical LC molecular orientation states. It is found that the usual nematic LC materials are transparent in the millimeter wave region and the refractive index anisotropy is still large.

本文言語英語
ページ(範囲)199-207
ページ数9
ジャーナルMolecular Crystals and Liquid Crystals
409
DOI
出版ステータス出版済み - 2004
イベントProceedings of the 19th International Liquid Crystal Conference, ILCC2002 - Edinburgh, 英国
継続期間: 2002/06/302002/07/05

ASJC Scopus 主題領域

  • 化学一般
  • 材料科学一般
  • 凝縮系物理学

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