Three dimensional molecular orientation in photocrosslinkable polymer liquid crystals using one-and two-photon excitation
| Project/Area Number |
17350111
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Polymer/Textile materials
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| Research Institution | University of Hyego |
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Principal Investigator |
KAWATSUKI Nobuhiro University of Hyego, Graduate School of Engineering, Associate Professor, 工学研究科, 准教授 (60271201)
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| Co-Investigator(Kenkyū-buntansha) |
KAMADA Kenji AIST, Senior Researcher, 光技術研究部門, 主任研究員 (90356816)
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| Project Period (FY) |
2005 – 2006
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| Project Status |
Completed (Fiscal Year 2006)
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| Budget Amount *help |
¥5,000,000 (Direct Cost: ¥5,000,000)
Fiscal Year 2006: ¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 2005: ¥3,200,000 (Direct Cost: ¥3,200,000)
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| Keywords | Polymer liquid crystal / Photoinduced reorientation / Polarization selective photosensitization / Polarization grating / Birefringent film / two-photon excitation |
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| Research Abstract |
The axis-selective two-photon excitation and polarization-preserved triplet energy transfer using a LP 800-nm pulse laser generated an anisotropic photoreaction in triplet photosensitizer-doped, photocrosslinkable polymer liquid crystalline films. Annealing the exposed films resulted in thermally enhanced photoinduced reorientation of the mesogenic groups parallel to the polarization of the laser beam. The generated in-plane order parameter was +0.75, which is greater than the value obtained by the conventional one-photon absorption method using LP 405-nm light. The superior axis selection of the TPA process of the triplet photosensitizer compared to that of one-photon excitation leads to a higher reorientational value for thermally enhanced photoinduced optical anisotropy. A tightly focused LP 800-nm fs laser beam generated a sub-micro-oriented structure without the annealing process.
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Report
(3 results)
Research Products
(20 results)
