Large birefringence and polarization holographic gratings formed in photocross-linkable polymer liquid crystals comprising bistolane mesogenic side groups

Journal Article · Thu Oct 01 00:00:00 EDT 2009 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3234385· OSTI ID:21361862

Emoto, Akira; Matsumoto, Taro; Shioda, Tatsutoshi; Ono, Hiroshi ^[1]; Yamashita, Ayumi; Kawatsuki, Nobuhiro ^[2]

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1. Department of Electrical Engineering, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, Niigata 940-2188 (Japan)
2. Department of Materials Science and Chemistry, Graduate School of Engineering, University of Hyogo, 2167 Shosha, Himeji, Hyogo 671-2201 (Japan)

Polarization gratings with large birefringence are formed in photoreactive polymer liquid crystals with bistolane moiety and terminal cinnamic acid moiety by the use of polarized ultraviolet interference light and subsequent annealing. The polarized ultraviolet light causes the axis-selective photoreaction between the cinnamic acid groups and subsequent annealing induce the reorientation of peripheral molecules without cross-linking along the cross-linked groups. Long bistolane mesogenic moiety exhibits large birefringence in comparison with a biphenyl mesogenic moiety, the value of the induced birefringence in the bistolane mesogenic liquid crystalline (LC) polymer is strongly dependent on both the grating constant and the wavelength of the reconstruction light.

• OSTI ID: 21361862
• Journal Information: Journal of Applied Physics, Vol. 106, Issue 7; Other Information: DOI: 10.1063/1.3234385; (c) 2009 American Institute of Physics; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANNEALING
BIPHENYL
BIREFRINGENCE
CINNAMIC ACID
CROSS-LINKING
HOLOGRAPHY
INTERFERENCE
LIQUID CRYSTALS
MOLECULES
PHOTOCHEMISTRY
POLARIZATION
POLYMERS
ULTRAVIOLET RADIATION
WAVELENGTHS
AROMATICS
CARBOXYLIC ACIDS
CHEMICAL REACTIONS
CHEMISTRY
CRYSTALS
ELECTROMAGNETIC RADIATION
FLUIDS
HEAT TREATMENTS
HYDROCARBONS
LIQUIDS
MONOCARBOXYLIC ACIDS
ORGANIC ACIDS
ORGANIC COMPOUNDS
POLYMERIZATION
RADIATIONS
REFRACTION