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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 10 — May. 20, 2013
  • pp: 12135–12144

Determination of surface nematic liquid crystal anchoring strength using nano-scale surface grooves

Yoonseuk Choi, Hiroshi Yokoyama, and Jin Seog Gwag  »View Author Affiliations

Optics Express, Vol. 21, Issue 10, pp. 12135-12144 (2013)

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Based on several nano-scale groove models, we propose a new technique to simultaneously determine the azimuthal and polar surface anchoring strengths of nematic liquid crystal (LC). The optical analysis of LCs on a grooved surface made by nanoimprinting lithography was performed on special alignment material, using a typical rubbing process. In our approach, using a polarizing microscope, we can determine the LC alignment exactly as it is in a parallel state, rather than a twisted state. This simple proposed method gives an accurate value of the surface LC anchoring of various surfaces, as well as simultaneously measuring the azimuthal and polar anchoring energy.

© 2013 OSA

OCIS Codes
(120.2040) Instrumentation, measurement, and metrology : Displays
(160.3710) Materials : Liquid crystals
(230.3720) Optical devices : Liquid-crystal devices
(240.0240) Optics at surfaces : Optics at surfaces

ToC Category:
Optical Devices

Original Manuscript: April 9, 2013
Revised Manuscript: May 6, 2013
Manuscript Accepted: May 7, 2013
Published: May 10, 2013

Yoonseuk Choi, Hiroshi Yokoyama, and Jin Seog Gwag, "Determination of surface nematic liquid crystal anchoring strength using nano-scale surface grooves," Opt. Express 21, 12135-12144 (2013)

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