Stokes-parameter analysis of the polarization of light transmitted through a chiral nematic liquid-crystal cell

Kai L. Woon, Mary O'Neill, Gary J. Richards, Matthew P. Aldred, Stephen M. Kelly

研究成果: Article査読

8 被引用数 (Scopus)

抄録

A spectroscopic Stokes polarimeter is used to directly measure the linearly, circularly, and randomly polarized components of light obtained on transmission of unpolarized light through thick chiral nematic liquid-crystal cells in the stop band. The Stokes parameters are simulated to fit the experimental data by use of the Berreman 4 × 4 transfer matrix by means of the Jones and Stokes vectors and taking into account multiple reflections at the interfaces of the cell. Excellent agreement is obtained. The transmitted light through a commercial cell is mainly circularly polarized at normal incidence, but a significant linearly polarized component is also observed. The model shows that this results from refractive-index mismatching at the liquid-crystal-alignment-layer interface, but a small linearly polarized component remains even with optimized index matching. An improved device configuration incorporating random defects at the exit boundary of the liquid crystal gives a highly circularly polarized output with virtually no linear or unpolarized components.

本文言語English
ページ(範囲)760-766
ページ数7
ジャーナルJournal of the Optical Society of America A: Optics and Image Science, and Vision
22
4
DOI
出版ステータスPublished - 2005 4
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 原子分子物理学および光学
  • コンピュータ ビジョンおよびパターン認識

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