Modified Debye model parameters of metals applicable for broadband calculations
Modified Debye model parameters of metals applicable for broadband calculations
复制标题
适用于宽带计算的金属修正德拜模型参数
DOI：
10.1364/ao.46.002229
复制
发表时间：
2007-04-20
期刊：
影响因子：
1.9
通讯作者：
Tian, Qian
中科院分区：
文献类型：
--
作者：
Gai, Hongfeng;Wang, Jia;Tian, Qian
如果激励源是脉冲，则时域有限差分法可以提供宽带结果。这就要求模拟材料的参数必须适用于宽频带。我们使用大规模的非线性优化算法优化修改后的德拜模型参数的金，银，铜，铂和铝。在较宽的频带内，利用优化参数计算的复相对折射率与实验值吻合较好。相关均方根偏差分别为0.49%、3.52%、4.13%、1.64%和0.66%。我们还提供了一个宽带计算的例子。所得到的宽带结果进行了验证，通过一系列的稳态计算。(c)2007年，美国光学学会。
The finite-difference time-domain method can provide broadband results if the excitation source is a pulse. This demands that the parameters of modeled materials have to be applicable over broad frequency bands. We optimize the modified Debye model parameters for gold, silver, copper, platinum, and aluminum using a large-scale nonlinear optimization algorithm. The complex relative permittivities calculated using the optimized parameters agree well with experimental values over broad frequency bands. The associated root-mean-square deviations are 0.49%, 3.52%, 4.13%; 1.64%, and 0.66%, respectively. We also provide an example of broadband calculations. The obtained broadband results are verified by a series of steady-state calculations. (c) 2007 Optical Society of America.