关于芯帽结构的仿真,为什么我的共振峰比别人的大很多呢?哪里错了,求指教!


#1

500-900-6 753.fsp (293.5 KB)


#2

我做了一些调整,现在吸收谐振在720纳米附近。当你用ConformalVariant1时,你需要跟多的收敛性测试,需要更细的网格。
但你的结果与别人不同时,首先需要想到材料是不是完全一样?其它的请 参见这个帖子
500-900-6 753.fsp (292.6 KB)


#3

老师,您好!
(1)我看官方手册上说Conformal variant 0 不能用于金属或PEC材料,但是Conformal variant 1 可以用于所有材料。为什么我的sio2微球上包覆了金壳,您给我改成了Conformal variant 0 呢?
(2)在设置TFSF光源时,用 set frequency/wavelength 比set time domain 简单容易,但是得到的曲线不如它光滑,另外frequency、pulselength、offset、bandwide是怎么设置的?谢谢!


#4

A1:那是你没有好好读它的使用条件,它需要很细的网格,至于多少是很细,没有标准:
If your simulation involves metals, then you may want to consider using Conformal variant 1. In this variant, CMT is applied to all materials, including metals. CMT will give better convergence than staircasing for small enough mesh sizes, but at larger mesh sizes it can sometimes give much worse results. Unfortunately, the size of a ‘small enough’ mesh is highly dependent on the simulation. In some cases, a <5nm mesh is sufficient, while in other cases a 1nm is not sufficient (optical wavelengths). Please do some careful convergence testing between Conformal variant 0 and Conformal variant 1 to test which method you should use for your particular application. Conformal variant 1 may give numerical artifacts when |εplasma|>> |εdielectric| and the mesh size is not sufficiently small.
A2: 什么曲线? 只要你的仿真时间设置的足够,无论是频率-强度还是波长-强度的频谱曲线都很光滑。frequency、pulselength、offset、bandwide是在光源的时间域设置,一般能保证原有的波长范围。