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This paper studies analytically and numerically the dynamics of two-dimensional elliptical Gaussian solitons in a "double-self-focusing" synthetic nonlocal media featuring elliptical and circular Gaussian response with different degrees of nonlocality.Based on the variational approach,it obtains the approximately analytical solution of such Gaussian elliptical solitons.It also computes the stability of the solitons by numerical simulations. 相似文献
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We study the molecular penetration depth variation with the SMBI fluxes.The molecular transport process and the penetration depth during SMBI with various injection velocities and densities are simulated and compared.It is found that the penetration depth of molecules strongly depends on the radial convective transport of SMBI and it increases with the increase of the injection velocity.The penetration depth does not vary much once the SMBI injection density is larger than a critical value due to the dramatic increase of the dissociation rate on the fueling path.An effective way to improve the SMBI penetration depth has been predicted,which is SMBI with a large radial injection velocity and a lower molecule injection density than the critical density. 相似文献
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In this article, we investigate the existence of periodic solutions for a class of nonautonomous second-order differential systems with p(t)-Laplacian. Some multiplicity results are obtained by using critical point theory, which extend some known results. 相似文献
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对数型非线性电介质中的一维空间亮孤子 总被引:3,自引:0,他引:3
研究了对数型非线性电介质中空间亮孤子,认为对数型电介质中可支持亮空间孤子,并对其束宽变化作了分析,指出其束宽变化与光源峰值功率成反比:当功率较低时,束宽随功率的增大而急剧减小,表现出良好的非线性效应;当功率不断增大时,束宽的减小趋势逐渐放慢直至停止,对数型材料呈现饱和特性。 相似文献
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THEORY OF OPTICAL WAVE COUPLING IN THE PRESENCE OF MAGNETOSTATIC SURFACE WAVES 总被引:1,自引:0,他引:1 下载免费PDF全文
The general expression of magneto-optical permittivity tensor including the Faraday and Cotton-Mouton effects is derived and the coupled wave equations for the optical modes propagating in an arbitrary direction with respect to the magnetostatic surface wave are obtained. The optical multimode coupled wave equations will reduce to the bi-mode ones in the phase-matching conditions. The behaviors of four types of important optical bi-mode coupling are discussed and some new results are obtained. In the limits of α= 0 and π/2, all results obtained reduce to those reported in the literature. 相似文献