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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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以环氧氯丙烷(1)和NaHSO3为原料,Na2SO3为引发剂,乙二胺四乙酸二钠(EDTA2Na)为络合增效剂,经酸催化开环反应合成了磺酸型两性表面活性剂中间体--3-氯-2-羟基丙磺酸钠(2),其结构经1H NMR, IR和ESI-MS确证。在最佳反应条件[1 0.55 mol, n(NaHSO3): n(Na2SO3): n(EDTA2Na): n(H2O)=1.00 : 0.04 : 0.01 : 9.50, 1的滴加时间15 min,在适宜的转速(前期100 rpm, 后期300 rpm)下,于70 ℃(浴温)反应1.25 h]下合成的2,收率81.55%。并对反应机理进行了推测。 相似文献
3.
Elliptic vortex solitons are investigated in anisotropic nonlocal media with more general formulations. We address the existence and dynamics of such solitons analytically and numerically. The solution of elliptic vortex solitons depends on the eccentricity of both the input beam and nonlocal response function. With different degrees of nonlocality, we numerically investigate the evolution of the elliptic vortex solitons, and find that, typically, the elliptic vortex solitons with single and double charges collapse into spiraling dipole- and tripolelike soliton clusters, respectively. 相似文献
4.
Exact solutions of Gaussian solitons in nonlinear media with a
Gaussian nonlocal response are obtained. Using the variational
approach, we obtain the approximate solutions of such solitons when
the degree of the nonlocality is arbitrary. Specifically, we study
the conditions for Gaussian solitons that propagate in weakly
and highly nonlocal media. We also compare the variational result
with the known exact solutions for weakly and highly nonlocal media. 相似文献
5.
The propagation of spatial solitons is systematically investigated
in nonlocal nonlinear media with an imprinted transverse periodic
modulation of the refractive index. Based on the variational
principle and the infinitesimal approximation of Maclaurin series
expansion, we obtain an analytical solution of such nonlocal spatial
solitons and an interesting result that the critical power for such
solitons propagation is smaller than that in uniform nonlocal
self-focusing media. It is found that there exist thresholds in
modulation period and lattice depth for such solitons. A stable
spatial soliton propagation is maintained with proper adjustment of
the modulation period and the lattice depth. 相似文献
6.
This paper studies the propagation of dipole solitons in
highly nonlocal medium by using the variational method. It finds
that the dipole solitons will be stable when the input power obeys a
restrict value. When the incident power does not satisfy the stable
conditions, the nonlocal accessible dipole solitons will undergo
linear harmonic oscillation. It shows such evolution behaviours in
detail. 相似文献
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