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Monolayer dielectrics and generation of Maxwell-displacement current and optical second harmonics
Iwamoto, M; Manaka, T; Zhong-Can, OY; Iwamoto, M , Tokyo Inst Technol, Dept Phys Elect, Meguro Ku, O Okayama 2-12-1 S2-33, Tokyo 1528552, Japan.
2004
发表期刊IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
ISSN1070-9878
卷号11期号:5页码:785-796
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.
部门归属Tokyo Inst Technol, Dept Phys Elect, Meguro Ku, Tokyo 1528552, Japan; Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China
关键词Air-water-interface 2nd-harmonic Generation Orientational Order Phase-transitions Dipole-moments Langmuir Monolayers Rotational Averages Liquid-crystals Films Surface
学科领域Physics
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收录类别SCI
WOS记录号WOS:000224490000005
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文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/13988
专题理论物理所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.
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Iwamoto, M,Manaka, T,Zhong-Can, OY,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 Iwamoto, M,Manaka, T,Zhong-Can, OY,&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 Iwamoto, M,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.
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