Measurement of transmission and reflection coefficients for metallic materials

- September 25, 2022 at 3:04 am
  
  2212296
  Subscriber
  
  Hi guys
  I am working on a simulation of the transmission and reflection spectra of a metal aluminum ring (conductance: 3.56E7 S/m).
  The thickness of the ring is 200nm, and the substrate is silicon (epslion: 11.7, thickness: 500um)
  When I set it up, I found that the running memory was so large(tens of G) that my computer couldn't emulate it.
  Is there any other way to shorten the running memory and time? ?
  best
- September 25, 2022 at 3:07 am
  
  2212296
  Subscriber
  
  In addition, in the terahertz band
- September 26, 2022 at 5:50 pm
  
  Guilin Sun
  Ansys Employee
  
  If you are not simulating SPP effect, I would suggest you to use PEC, or better 2D sheet PEC:
  https://optics.ansys.com/hc/en-us/articles/360034915113-Standard-optical-conductivity-material-models-in-FDTD-and-MODE
  Bulk metals have large permittivity with heavy loss. FDTD needs very fine mesh to resolve the physics. Therefore it needs a lot meshes so huge memory requirement.