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Dependence of Retardation Dispersion on the Ultraviolet Polarization Direction During Photopolymerization of Self-organized Smectic Reactive Mesogen Molecules

  • Jeong, Jinyoung (Future Semiconductor Convergence Technology Research Center, Division of Electronics Engineering, Chonbuk National University) ;
  • Choi, Yu-Jin (Department of Polymer-Nano Science and Technology, Chonbuk National University) ;
  • Jeong, Kwang-Un (Department of Polymer-Nano Science and Technology, Chonbuk National University) ;
  • Lee, Ji-Hoon (Future Semiconductor Convergence Technology Research Center, Division of Electronics Engineering, Chonbuk National University)
  • Received : 2018.04.02
  • Accepted : 2018.06.08
  • Published : 2018.06.25

Abstract

We investigated the dependence of the retardation dispersion on the polarization direction of ultraviolet (UV) light during the photopolymerization of self-organized smectic reactive mesogen (RM) molecules. RM retarder film that was photopolymerized with UV light linearly polarized parallel to the layer plane showed negative dispersion (ND) of retardation for a wide range of UV polymerization temperatures. On the other hand, film that was photopolymerized with unpolarized UV light showed negative dispersion in a narrow range of UV polymerization temperatures. With a certain UV polymerization temperature, the dispersion of retardation was converted from positive to negative, depending on the UV polarization.

Acknowledgement

Supported by : Korea Display Research Consortium, National Research Foundation (NRF)

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