Monolayer dielectrics and generation of Maxwell-displacement current and optical second harmonics

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	Monolayer dielectrics and generation of Maxwell-displacement current and optical second harmonics
	Zhong-Can, OY; Iwamoto, M; Manaka, T; Iwamoto, M , Tokyo Inst Technol, Dept Phys Elect, Meguro Ku, O Okayama 2-12-1 S2-33, Tokyo 1528552, Japan.
刊名	IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
	2004
卷号	11 期号:5 页码:785-796
关键词	Air-water-interface 2nd-harmonic Generation Orientational Order Phase-transitions Dipole-moments Langmuir Monolayers Rotational Averages Liquid-crystals Films Surface
ISSN号	1070-9878
英文摘要	Optical second harmonic generation (SHG) and Maxwell displacement current (MDC) spectroscopy for the exploration of the dielectric polarization phenomena in organic monolayer film are described. It is shown that MDC and SHG are generated from the monolayers due to their noncentrosymetric structure; the spontaneous polarization and the nonlinear polarization are the main contributions to the MDC and SHG, respectively. The developed MDC measurement coupled with the SHG measurement are shown to be helpful for the study of the orientation order and the phase transition of the monolayers, and thus helpful for the understanding of surface polarization phenomena. In order to show the effect of the SHG-MDC spectroscopy, the dielectric polarization of organic monolayer with C-infinity-symmetry is theoretically analyzed with a simple rod-like model. The spontaneous and nonlinear polarization induced in this modeled monolayer system is expressed in orientational order parameters defined by the thermodynamic averages of Legendre polynomials of the orientation angle. The experiments on the SHG and MDCs of mesogenic liquid crystal (LC) monolayers of 4'n-octyl-4-cyanobiphenyl (8CB) on the air-water interface are shown. Finally, piezoelectric effect and flexoelectric effect in monolayers are briefly discussed.
学科主题	Physics
URL标识	查看原文
WOS记录号	WOS:000224490000005
公开日期	2012-08-30
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/13988]
专题	理论物理研究所_理论物理所1978-2010年知识产出
通讯作者	Iwamoto, M , Tokyo Inst Technol, Dept Phys Elect, Meguro Ku, O Okayama 2-12-1 S2-33, Tokyo 1528552, Japan.
推荐引用方式 GB/T 7714	Zhong-Can, OY,Iwamoto, M,Manaka, T,et al. Monolayer dielectrics and generation of Maxwell-displacement current and optical second harmonics[J]. IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION,2004,11(5):785-796.
APA	Zhong-Can, OY,Iwamoto, M,Manaka, T,&Iwamoto, M , Tokyo Inst Technol, Dept Phys Elect, Meguro Ku, O Okayama 2-12-1 S2-33, Tokyo 1528552, Japan..(2004).Monolayer dielectrics and generation of Maxwell-displacement current and optical second harmonics.IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION,11(5),785-796.
MLA	Zhong-Can, OY,et al."Monolayer dielectrics and generation of Maxwell-displacement current and optical second harmonics".IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION 11.5(2004):785-796.