Top-down extended meshing algorithm and its applications to Green's tensor nano-optics calculations.
Top-down extended meshing algorithm and its applications to Green's tensor nano-optics calculations.
复制标题
自上而下的扩展网格划分算法及其在格林张量纳米光学计算中的应用。
DOI：
10.1103/physreve.75.046702
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
P. Johansson
中科院分区：
文献类型：
--
作者：
J. Alegret;M. Käll;P. Johansson
我们提出了一种计算算法，加快了绿色的张量纳米光学计算的优化网格，代表我们要调查的系统。该算法自动创建描述任意纳米结构的可变大小网格的过程。该网格的元素总数小于表示相同结构的规则网格的元素总数，因此可以更快地执行绿色张量计算。但是，精度保持在与常规网格相似的水平。通常，该算法产生的网格将绿色的张量计算速度提高了4倍，同时给出了约5%的场幅度的最大误差。加速因子使其非常适合于其他冗长的计算，并且对于大多数应用程序来说，误差应该是可以接受的。
We present a computational algorithm which speeds up Green's tensor nano-optics calculations by means of optimizing the mesh that represents the system we want to investigate. The algorithm automates the process of creating a variable-size mesh that describes an arbitrary nanostructure. The total number of elements of this mesh is smaller than that of a regular mesh representing the same structure, and thus the Green's tensor calculations can be performed faster. Precision, however, is kept at a similar level than for the regular mesh. Typically, the algorithm yields a mesh that speeds up Green's tensor calculations by a factor of 4, while giving a maximum error in the field magnitude of about 5%. The speed-up factor makes it very suitable for otherwise lengthy calculations, and the error should be acceptable for most applications.