Laser Induced Kerr effect spectroscopy
激光诱导克尔效应光谱
基本信息
- 批准号:09450035
- 负责人:
- 金额:$ 8.32万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (B)
- 财政年份:1997
- 资助国家:日本
- 起止时间:1997 至 1998
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Complex fluids such as gels, emulsions and bio-systems attract a great physical interest since they could be applied for various industries as new functional materials. The characteristic properties of the complex fluids can be attributed to their large degree of freedom, such as molecular conformation and association. The molecular orientation is one of the important orders, which plays a significant role in creating the liquid crystal phase. The purpose of the study is to develop a new experimental system for observing the orientational molecular dynamics of liquid materials in a wide frequency range.We successfully developed the optical Kerr effect spectroscopy technique with a continuous wave laser. The anisotropic shape of the molecule necessarily accompanies the anistropic dielectricity. The electric field of the polarized laser beam induces the molecular orientation, which is measured by the optical ellipsometry as the Kerr effect. The critical phenomenon was observed for the nematogen near the nematic-isotropic phase transition temperature. The system was improved to observe the dynamic process of molecule rotation. The Pockels cell was driven with a wide band power supply for the high frequency control of the laser polarization. The complex response function was accurately measured, which gives us an important information on the phase transition and the molecular dynamics of liquid crystals. We observed the relaxation of the optical Kerr effect for the first time in the frequency domain in various kinds of liquid crystals. The laser induced molecular orientation technique would be a powerful tool for the investigation of the mechanism of phase transition of liquid crystals.
凝胶、乳液和生物系统等复杂流体作为新型功能材料可应用于各个行业,因此引起了物理学家的极大兴趣。复杂流体的特性可归因于它们的大自由度,如分子构象和缔合。分子取向是形成液晶相的重要顺序之一,对液晶相的形成起着重要的作用。本研究的目的是建立一种在宽频率范围内观察液体材料取向分子动力学的新实验系统。我们成功地开发了连续波激光器的光学克尔效应光谱技术。分子的各向异性形状必然伴随着各向异性介电性。偏振激光束的电场诱导分子取向,用光学椭偏仪测量分子取向的克尔效应。在向列各向同性相变温度附近观察到线虫的临界现象。对该系统进行了改进,用于观察分子旋转的动态过程。采用宽带电源驱动波克尔斯电池,实现了激光偏振的高频控制。复响应函数的精确测量为液晶的相变和分子动力学提供了重要的信息。我们首次在不同种类液晶的频域中观察到光学克尔效应的弛豫。激光诱导分子取向技术将成为研究液晶相变机理的有力工具。
项目成果
期刊论文数量(7)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Y.Ohki, N.Sakamoto, K.Sakai and K.Takagi: "Measurement system for optical Kerr effect induced by continuous wave laser" Review of Scientific Instruments. 69. 2871-2875 (1998)
Y.Ohki、N.Sakamoto、K.Sakai 和 K.Takagi:“连续波激光引起的光学克尔效应的测量系统”科学仪器评论。
- DOI:
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- 影响因子:0
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- 通讯作者:
S.Mitani, K.Sakai and K.Takagi: "Measurement of coherent backscattering phenomena in emulsions" Japanese Journal of Applied Physics. (in press). (1999)
S.Mitani、K.Sakai 和 K.Takagi:“乳液中相干反向散射现象的测量”日本应用物理学杂志。
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- 发表时间:
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- 影响因子:0
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- 通讯作者:
H.Tanaka, K.Hattori, K.Sakai and K.Takagi: "Brillouin Scattering Measurement of Optothermally Excited Phonon" Japanese Journal of Applied Physics. Vol.36,No.10B. L1415-L1418
H.Tanaka、K.Hattori、K.Sakai 和 K.Takagi:“光热激发声子的布里渊散射测量”日本应用物理学杂志。
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- 影响因子:0
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- 通讯作者:
S.Mitani, K.Sakai and K.Takagi: "Measurement of coherent backscattering phenomena in emulsions" Japanese Journal of Applied Physics. 38(in press). (19)
S.Mitani、K.Sakai 和 K.Takagi:“乳液中相干反向散射现象的测量”日本应用物理学杂志。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
Y.Oki、K.Sakamoto、K.Sakai and K.Tkagi: "Measurement system for optical Kerr effect induced by continuous wave laser" Review of Scientific Instruments. 69. 2871-2874 (1998)
Y.Oki、K.Sakamoto、K.Sakai 和 K.Tkagi:“连续波激光引起的光学克尔效应的测量系统”科学仪器评论 69. 2871-2874 (1998)。
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- 影响因子:0
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SAKAI Keiji其他文献
SAKAI Keiji的其他文献
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{{ truncateString('SAKAI Keiji', 18)}}的其他基金
Development of soft liquid process for fabrication of micro-functional device
微功能器件软液体工艺开发
- 批准号:
22360036 - 财政年份:2010
- 资助金额:
$ 8.32万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
Nano-rheology engineering using in-air micro-droplet technology
使用空气微滴技术的纳米流变工程
- 批准号:
19360039 - 财政年份:2007
- 资助金额:
$ 8.32万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
Development of rapid ripplon spectroscopy and its application to liquid surface physics
快速波纹谱的发展及其在液体表面物理中的应用
- 批准号:
15360035 - 财政年份:2003
- 资助金额:
$ 8.32万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
Study on Non-equilibrium Interface Phenomena by Doppler Rippbn Spectroscopy
多普勒Rippbn光谱研究非平衡界面现象
- 批准号:
13450032 - 财政年份:2001
- 资助金额:
$ 8.32万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
Development of opto-thermal phonon transducer driven by semiconductor laser
半导体激光器驱动光热声子换能器的研制
- 批准号:
11555020 - 财政年份:1999
- 资助金额:
$ 8.32万 - 项目类别:
Grant-in-Aid for Scientific Research (B).
Study on High Frequency Dynamics of Liquid Surface by Laser Induced Surface Vibration Spectroscopy
激光诱导表面振动光谱研究液体表面高频动力学
- 批准号:
11450036 - 财政年份:1999
- 资助金额:
$ 8.32万 - 项目类别:
Grant-in-Aid for Scientific Research (B).
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