A method for quantitatively analyzing the angle of direction for arbitral c-axis alignment with retardation measurements

Norihiro Shimoi, Yasumitsu Tanaka

Research output: Contribution to journalArticlepeer-review

Abstract

c-axis alignment in a polymer or crystal structure has drawn attention in numerous scientific and technological applications, including crystals, thin film growth, electro-optic devices, and phase difference optics. We here demonstrate a new approach based on retardation measurement that can obtain the direction of the c-axis alignment. This is employed to visualize the three-dimensional direction of continuous crystals as a thin optical film utilizing a liquid crystal panel, using retardation analysis equipment with high resolution measurement capability. The direction of the c-axis alignment is shown so as to allow a detailed characterization of the direction perpendicular to the plane. In this analysis, the direction of the c-axis alignment is identified, and differences between molecules at inequivalent sites are quantified. The results suggest that the excellent lubrication properties of the c-axis alignment may be due to a significant localization in lateral directions.

Original languageEnglish
Pages (from-to)189-193
Number of pages5
JournalOptics and Laser Technology
Volume65
DOIs
Publication statusPublished - 2015 Jan

Keywords

  • Optical c-axis alignment
  • Optical compensator film
  • Photonic-crystal array

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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