Dielectric Nano Sphere

中文/English

To simulate single dielectric sphere, refractive index = 1.5 , radius = 200 nm (diameter=400nm) and then observe the scattering-absorption spectrum

Theoretical Solution refer to this web

https://nanocomposix.com/pages/tools


Example results and CAD download

https://drive.google.com/open?id=1Uv2RbywPTq1OGuS2a3jc4sSgNt1eLlmi

*.FCstd is the save file of FreeCAD



Add the boundary of the CAD files (FreeCAD)



Define Parameters

1. Selected the simulation dimension.

2. Define total x, y, z length that equal to CAD, and then set a appropriate resolution.

3. Import CAD files.

4. Define the material of each CAD.

5. Press【建立網格 Cad to Grids (Create)】button to create simulation grids.


* Dielectric Constant of Sphere define n^2 = 1.5^2 = 2.25,


Due to FreeCAD default unit is mm, and in this case the sphere unit is nm. If use nm unit in FreeCAD, the resolution of output STL file will not enough. So, at here express

"the unit can directly transform between any unit, nm <=> um <=> mm "





A. Define the boundary conditions

B. Press the【創建 (Create)】button => Create the total grid size (Include the boundary condition & add space)



To simulate the Scattering-Absorption spectrum, select the (TFSF-RCS) radar cross section source




None, press 【創建(Create)】 button




Checked out the simulation geometries, and then press 【輸出 Output】button to output the geometries files

Data_Materials.csv // (simulation index of structures)



1. Set the Spectrum Analysis & Wavelength range

2. Check out the source




1. Set the simulation time setp

2. Save parameters

3. Calculation



★(Result Analysis):

頻譜 (Spectrum) : Analysis the spectrum




Theoretical Solution refer to this web

https://nanocomposix.com/pages/tools