Anomalously large electrooptic response of water at the air-water interface
| Project/Area Number |
15K05134
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Condensed matter physics I
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| Research Institution | Tokyo University of Science |
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Principal Investigator |
Tokunaga Eiji 東京理科大学, 理学部第一部物理学科, 教授 (70242170)
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2015: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
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| Keywords | 水 / 電気光学効果 / ポッケルス効果 / 気水界面 / 固液界面 / 水素結合 / 電気二重層 / 界面 / 屈折率 / 気液界面 |
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| Outline of Final Research Achievements |
We examined why the signal reproducibility is low about the Pockels effect of the air/water interface with an electric field vertical to the interface and clarified:
(1)When DC electric field is superimposed on AC field, signal is increased.(2)The lower the modulation frequency, the larger the signal.(3)There is a vertical movement of the water surface on the order of micrometer.(4)Since the signal is observed with a photodiode having a detection area larger than the probe beam size, there is a true Pockels effect due to the refractive index change at the air-water interface, not influenced by the vertical movement.It is found that water at the air-water interface shows an anomalously large Pockels effect with an electric field applied parallel to the interface,methanol and ethanol also have a large Pockels coefficient at the liquid-electrode interface,and the Pockels effect occurs in bulk water because the charged diffuse layer expands to bulk region under an AC electric field.
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Report
(4 results)
Research Products
(7 results)
