Construction of Precise Analysis System of Conoscopic Images in Liquid Crystals
液晶锥光图像精密分析系统的构建
基本信息
- 批准号:11555003
- 负责人:
- 金额:$ 4.35万
- 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:1999
- 资助国家:日本
- 起止时间:1999 至 2001
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
1. We constructed a system to observe conoscopic images using a He-Cd laser, which surves one of shortest wavelength light sources.2. We constructed a program for analyzing conoscopic images using the 4x4 matrix method.3. We observed helix unwinding processes in ferroelectric liquid crystals by an electric field in detail utilizing the constructed system, and obtained the following results.3-1. The experimental results agree with the simulation results by the 4x4 matrix method based on the field-induced helix unwinding process by elastic theory. Particularly, negative biaxiality was observed by the application of an electric field and was theoretically explained.3-2. So far, the negative biaxiality was thought to be characteristic in ferrielectric phases and was used to identify the ferrielectrie phase. However, we clarify that the field-induced negative biaxiality is generally observed in the ferroelectric phase and cannot be used to identify the ferrielectrie phases.3-3. We found that the previous conoscopic observation in MHPOBC, in which the antiferroelectric phase was first confirmed, was made using unsaficient field strength, that cannot induce complete helix unwinding. We reobserved the conoscopic images in detail by applying high fields saficient to induce complete helix unwinding. As results, we concluded that the helix unwinding process in MHPOBC cannot be explained only by considering ferroelectric interaction between the applying field and the polarization.
1.我们利用波长最短的He-Cd激光器建立了锥光像观测系统.编制了锥光图像的4 × 4矩阵分析程序.利用所构建的系统,我们详细观察了电场作用下铁电液晶中螺旋的解旋过程,得到了以下结果.实验结果与基于弹性理论的场致螺旋解绕过程的4 × 4矩阵法的模拟结果一致。特别地,通过施加电场观察到负双轴性,并从理论上进行了解释。到目前为止,负双轴性被认为是铁电相的特征,并被用来识别铁电相。然而,我们澄清,场致负双轴性通常在铁电相中观察到,并且不能用于识别铁氧体相。我们发现,以前的锥光观察MHPOBC,其中反铁电相首次得到证实,是使用不安全的场强,不能诱导完全螺旋解旋。我们用安全的高场诱导螺旋完全解旋,重新详细观察了锥光像。结果表明,MHPOBC中的螺旋解旋过程不能仅仅用外加电场和极化之间的铁电相互作用来解释。
项目成果
期刊论文数量(18)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
T.Akizuki et al.: "Molecular Orientational Sructures with Macroscopic Helix in Antiferroelectric Liquid Crystal Subphase"Japanese Journal of Applied Physics. Vol.38. 4832-4837 (1999)
T.Akizuki 等人:“反铁电液晶亚相中具有宏观螺旋的分子取向结构”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.Suwa, Y.Takanishi, H.Hoshi, K.Ishikawa, H.Takezoe: "Helix unwinding process in the chiral smectic C phase of MHPOBC as observed by conoscopy"Liq. Cryst.. (submitted).
S.Suwa、Y.Takanishi、H.Hoshi、K.Ishikawa、H.Takezoe:“通过锥光观察观察到 MHPOBC 手性近晶 C 相中的螺旋解旋过程”Liq。
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- 影响因子:0
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T. Ogasawara, T. Akizuki, Y. Takanishi, K. Ishikawa and H. Takezoe: "Simulation of Conoscopic Figures Using 4 x 4 Matrix Method"Mol. Cryst. Liq. Cryst.. 362. 255-267 (2001)
T. Ogasawara、T. Akizuki、Y. Takanishi、K. Ishikawa 和 H. Takezoe:“使用 4 x 4 矩阵方法模拟锥光图形”Mol。
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- 影响因子:0
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S. Suwa, H. Hoshi, Y. Takanishi, K. Ishikawa, H.Takezoe and B. Zeks: "Helix Unwinding Process in a Short-Pitch Ferroelectric Liquid Crystal Mixture Studied by Conoscopy"Jpn. J. Appl. Phys.. (accepted).
S. Suwa、H. Hoshi、Y. Takanishi、K. Ishikawa、H. Takezoe 和 B. Zeks:“通过锥光检查研究短节距铁电液晶混合物中的螺旋展开过程”Jpn。
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- 影响因子:0
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- 通讯作者:
S. Suwa, Y. Takanishi, H. Hoshi, K. Ishikawa, and H. Takezoe: "Helix unwinding process in the chiral smectic C phase of MHPOBC as observed by conoscopy"Liq. Cryst.. (submitted).
S. Suwa、Y. Takanishi、H. Hoshi、K. Ishikawa 和 H. Takezoe:“通过锥光观察观察到 MHPOBC 手性近晶 C 相中的螺旋解旋过程”Liq。
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- 影响因子:0
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TAKEZOE Hideo其他文献
TAKEZOE Hideo的其他文献
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{{ truncateString('TAKEZOE Hideo', 18)}}的其他基金
New Science and Application in Bent-core Shaped Liquid Crystals
弯芯形液晶的新科学与应用
- 批准号:
16105003 - 财政年份:2004
- 资助金额:
$ 4.35万 - 项目类别:
Grant-in-Aid for Scientific Research (S)
Development of Totally Reflected Forced Bayleigh Scattering System and its Application to Molecular Diffusion near Liguid Crystal Substrate Surface
全反射受迫贝利散射系统的研制及其在液晶基板表面附近分子扩散中的应用
- 批准号:
04555013 - 财政年份:1992
- 资助金额:
$ 4.35万 - 项目类别:
Grant-in-Aid for Developmental Scientific Research (B)
Interpretation of the Appearance of the Antiferroelectric Phase in Smectic Liquid Crystals and the Application for Display Device
近晶液晶中反铁电相的出现及其在显示器件中的应用的解释
- 批准号:
04452089 - 财政年份:1992
- 资助金额:
$ 4.35万 - 项目类别:
Grant-in-Aid for General Scientific Research (B)
Fundamental Study on Electroclinic Effect in Smectic A Liquid Crystals and the Application for Fast Optical Modulator
近晶A液晶电致效应的基础研究及快速光调制器的应用
- 批准号:
63550227 - 财政年份:1988
- 资助金额:
$ 4.35万 - 项目类别:
Grant-in-Aid for General Scientific Research (C)
Pre-transitional Phenomenon of Nematic-smectic Phase Transition Observed by Elastic Constant - Observation of Frederiks Transition by Forced Rayleigh Scattering -
通过弹性常数观察到的向列-近晶相变的预转变现象 - 通过受迫瑞利散射观察 Frederiks 相变 -
- 批准号:
60540199 - 财政年份:1985
- 资助金额:
$ 4.35万 - 项目类别:
Grant-in-Aid for General Scientific Research (C)