Alignment Change of Discotic Liquid Crystal Domains with Wavelength Tunable CO₂ Laser Irradiation

Abstract:

Infrared-induced alignment change with wavelength tunable CO2 laser irradiation for columnar liquid crystal domains was investigated for a triphenylene-based discotic liquid crystal. A uniformly aligned alignment change of domains was observed when a plused linearly polarized infrared laser light corresponding to the wavelength of the aromatic C-O-C stretching vibration band (9.65µm) was irradiated while it was not re-aligned uniformly with continious wave irradiation. The results strongly imply that the infrared irradiation is a possible technique for device fabrication by use of columnar mesophase as a liquid crystalline semiconductor.

• Periodical: Key Engineering Materials (Volumes 428-429)
• Pages: 284-287
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.428-429.284
• Online since: January 2010
• Authors: Hirosato Monobe, Yo Shimizu
• Keywords: Alignment Control, Columnar Liquid Crystal, Discotic Liquid Crystal, Infrared

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