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Variation of Two-photon Absorption Cross Sections and Optical Limiting of Compounds Induced by static electric field

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Chinese Journal of Chemical Physics 2014年第3期27卷 259-264页

作者： Yu-jin Zhang Yu-zhi Song Chuan-kui Wang College of Physics and Electronics Shandong Normal University Jinan 250014 China

By numerically solving the Maxwell-Bloch equations using an iterative predictor-corrector finite-difference time-domain technique, we investigate propagating properties of a few-cycle laser pulse in a 4,4＇-bis（di-n-butylamino） stilbene （BDBAS） molecular medium when a static electric field exists. Dynamical two-photon absorption （TPA） cross sections are obtained and optical limiting （OL） behavior is displayed. The results show that when the static electric field intensity increases, the dynamical TPA cross section is enhanced and the OL behavior is improved. Moreover, both even- and odd-order harmonic spectral components are generated with existence of the static electric field because it breaks the inversion symmetry of the BDBAS molecule. This work provides a method to modulate the nonlinear optical properties of the BDBAS compounds.

关键词： static electric field Optical limiting Two-photon absorption Organic molecule

Research on the static Magnetic field of Ships with Corrosion and Anticorrosion Efficacy Using electric Dipole Model

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Defence Technology（防务技术） 2010年第2期6卷 133-139页

作者：陈聪李定国龚沈光 Naval University of Engineering

In the case of three-layered(air-seawater-seabed)model,the analytical expressions of the static electric and static magnetic field produced by the static electric dipole located in seawater were derived by using the mirror image *** with the distribution of the underwater electric potential measured in laboratory,an electric dipole model for physical scale of ship was established and the distribution characteristics of an actual ship' s corrosion related magnetic field were *** on established models,theoretical analysis and calculation were made to catch out the distribution characteristics of static magnetic field related with corrosion and anticorrosion,which can not be measured directly in *** results show that the static magnetic field related with corrosion and anticorrosion is a kind of noteworthy obstacle signal for degaussed ships.

关键词： weaponry engineering corrosion related magnetic field static electric field underwater electric potential mirror image theory electric dipole model

A Boundary Integral Equation Approach for Boundary Problem of Laplace Equation

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Chinese Quarterly Journal of Mathematics 2003年第4期18卷 429-434页

作者：孙建设叶留青 Department of Mathematics Jiaozuo Teacher's College Jiaozuo 454001

Using the second Green formula, the boundary problem of Laplace equation satisfied by potential function of static electric field is transformed to the problem of the boundary integral equation, and then a boundary in... 详细信息

关键词： Laplace equation boundary problem static electric field linear boundary element.