2015 Fiscal Year Final Research Report
Controlling electro-convection in a liquid crystal cell with a photoconductive crystal
| Project/Area Number |
24656017
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Applied materials science/Crystal engineering
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| Research Institution | Oita University |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
Orihara Hiroshi 北海道大学, 工学研究科, 教授 (30177307)
Hidaka Yoshiki 九州大学, 工学研究院, 助教 (70274511)
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| Project Period (FY) |
2012-04-01 – 2016-03-31
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| Keywords | 液晶電気対流 / パターン形成 |
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| Outline of Final Research Achievements |
When we apply an electric field and a laser beam on a liquid crystal with negative dielectric anisotropy which is sandwiched between a photoconductive crystal and a glass plate, a localized electro-convection is incused. The shape of electro-convection is as that of the laser beam. We measured the light intensity dependence of the threshold voltage of electro-convection and found the suitable condition to induce the electro-convection. As the increase of laser beam, the threshold voltage decreases exponentially and becomes a constant value.
We prepared a homogenous cell in which the director aligns a single direction and a twisted cell in which the director rotates by 90 degrees. For the homogenous cell, we investigated angle-deflective oscillation. For the twisted cell, on the other hand, we investigated a flow along the axis of convective rolls.
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| Free Research Field |
ソフトマター物理学
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