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Second harmonic generation at the interface of copper tetra-tert-butyl phthalocyanine Langmuir-Blodgett film/metal

Science China Chemistry 2003年第4期46卷 379-386页

作者：程晓曼姚素薇李成全间中孝彰岩本光正 School of Chemical Engineering & Technology Tianjin University Tianjin 300072 China Department of Opto-electronic Information & Electrical Engineering Tianjin Institute of Technology Tianjin 300191 China Department of Physical Electronics Tokyo Institute of Technology Tokyo 152-8552 Japan

Optical second harmonic generation (SHG) from the copper tetra-tert-butyl phthalocya-nine (CuttbPc) Langmuir-Blodgett (LB) film deposited on a metal-coated glass slide substrate has been investigated. It is considered that the symmetry of the CuttbPc molecule may be broken by the space charge-induced electric field (SCIEF) due to the exchanged charges at the CuttbPc LB film/metal interface. A four-layer model is used to explain the nonlinear optical process in the CuttbPc LB film. The thickness dependence, polarized and incident angle dependence of SHG signal from CuttbPc LB films are calculated. The results of calculation show a good agreement with the experimental data. It is shown that electrostatic phenomena.at the interface is correlated closely with SHG signal, and the SHG measurement is also a helpful tool for the detection of the space charge field at the interface.

关键词： SHG, phthalocyanine, LB film, interface, electrostatic phenomena.

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Granitoid intrusions and related deposits

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Science China Earth Sciences 1996年第1期39卷 1-6页

作者：孟良义李绪俊 Department of Geology Changchun University of Earth Scienoes Changchun 130026 China

Taking the Bainaimiao copper and gold deposits, Inner Mongolia and the Wushan copper deposits, Jiangxi Province as examples, a discussion is devoted to the relationship between the granitoid intrusions and related deposits from different lines of evidence: the spatial distribution, country rocks and alteration of the deposits, trace element contents and vertical zoning of elements in deposits, the metallogenic preference of granitoid intrusions, the metallogenic models and stable isotopic geology. It is concluded that the ore-bearing fluids mainly come from granitoid magmas and granitoid intrusions are closely associated with the related deposits in space.

关键词： granitoid intrusions hydrotfaennal deposit anomalous geological phenomena.

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LOCAL SOLVABILITY OF SECOND ORDER TRANSVERSELY HYPERBOLIC LEFT INVARIANT OPERATORS ON THE HEISENBERG GROUP

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Chinese Science Bulletin 1991年第7期36卷 534-537页

作者：崔尚斌 Department of Mathematics Lanzhou University Lanzhou 730000 PRC

Ⅰ. INTRODUCTIONConsider the differential operators■and(ajk)is a symmetric real matrix.Lx is a second order homogeneous left invariant opera-

关键词： Heisenberg group local solvability nondiscrete phenomena.

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