arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1011.1306nlin.PS
收藏

利用材料光栅和虚拟光栅将宽光束分裂成耗散空间孤子阵列

Splitting broad beams into arrays of dissipative spatial solitons by material and virtual gratings

Y. J. He, B. A. Malomed, F. Ye, J. Dong, Z. Qiu, H. Z. Wang, B. Hu

摘要:

本文在五阶(CQ)复Ginzburg-Landau(CGL)模型的框架下,详细阐述了两种产生二维空间孤子阵列的一般方法。第一种方法处理一个广泛的光束发射到耗散非线性介质,这是配备了一个足够尖锐的形式的压印光栅。光束分裂成一簇射流,如果能量足够,每个射流随后都会自陷成稳定的孤子。我们考虑两种尖锐的光栅--“升余弦”(RC)和Kronig-Penney(KP)晶格--和两种类型的输入光束,基波和涡旋。通过选择适当的参数,该方法可以产生各种类型的孤子阵列,如固体,环形(单环和双环),和十字形的。第二种方法使用“虚晶格”,以周期性横向相位调制的形式印入宽光束,该宽光束通过适当的相位掩模,然后照射到均匀的非线性介质中。两种不同类型的面具被认为是一个“棋盘”或“平铺”的形式。在这种情况下,如果光束的功率和虚相晶格的间距足够大,那么宽的基本光束和涡旋光束也可以演变成稳定的SSA。通过后一种技术,可以产生正方形、六边形和准晶体SSA。

英文摘要:

We elaborate two generic methods for producing two-dimensional (2D) spatial soliton arrays (SSAs) in the framework of the cubic-quintic (CQ) complex Ginzburg-Landau (CGL) model. The first approach deals with a broad beam launched into the dissipative nonlinear medium, which is equipped with an imprinted grating of a sufficiently sharp form. The beam splits into a cluster of jets, each subsequently self-trapping into a stable soliton, if the power is sufficient for that. We consider two kinds of sharp gratings -- "raised-cosine" (RC) and Kronig-Penney (KP) lattices -- and two types of the input beams, fundamental and vortical. By selecting appropriate parameters, this method makes it possible to create various types of solitons arrays, such as solid, annular (with single and double rings), and cross-shaped ones. The second method uses a "virtual lattice", in the form of a periodic transverse phase modulation imprinted into the broad beam, which is passed through an appropriate phase mask and then shone into a uniform nonlinear medium. Two different types of the masks are considered, in the form of a "checkerboard" or "tilings". In that case, broad fundamental and vortical beams may also evolve into stable SSAs, if the beam's power and spacing of the virtual phase lattice are large enough. By means of the latter technique, square-shaped, hexagonal, and quasi-crystalline SSAs can be created.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑