Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.
Simple Reflectivity/Transmission calculation for RF Air/Glass boundary
Posted Nov 21, 2012, 4:06 p.m. EST RF & Microwave Engineering 2 Replies
Please login with a confirmed email address before reporting spam
Hello.
I am an absolute beginner to COMSOL and am hoping to eventually use it to simulate some nanoparticle scattering effects for solar cell applications.
I have built a very simple model consisting of an Air - Glass - Air geometry and have excited a wave at a port on one of the Air sides. I've included PML and a suitable mesh. I see that the wave propogates through the air, into the glass (wavelength reduces by a half as n = 2.05 in glass) and back out into the air.
I would like to know a good method of proving the well known Fresnel equations for Reflectivity (n1-n2)/(n1+n2) mod all squared.
So far I have done line integrations at each boundary looking at Power Averages, and Ez, but I am not getting data that arrives at my calculated answers. Can anyone recommend a strategy for proving that the intensity of the wave obeys the Reflection/Transmission values calculated by hand?
Many thanks.
I am an absolute beginner to COMSOL and am hoping to eventually use it to simulate some nanoparticle scattering effects for solar cell applications.
I have built a very simple model consisting of an Air - Glass - Air geometry and have excited a wave at a port on one of the Air sides. I've included PML and a suitable mesh. I see that the wave propogates through the air, into the glass (wavelength reduces by a half as n = 2.05 in glass) and back out into the air.
I would like to know a good method of proving the well known Fresnel equations for Reflectivity (n1-n2)/(n1+n2) mod all squared.
So far I have done line integrations at each boundary looking at Power Averages, and Ez, but I am not getting data that arrives at my calculated answers. Can anyone recommend a strategy for proving that the intensity of the wave obeys the Reflection/Transmission values calculated by hand?
Many thanks.
2 Replies Last Post Nov 22, 2012, 6:33 a.m. EST
Please login with a confirmed email address before reporting spam
Posted:
1 decade ago
Hi
What about taking a look at the model library, i.e. "Fresnel equations" that should be a good starter. You have also many models on the model gallery on the main COMSOL web site
--
Good luck
Ivar
What about taking a look at the model library, i.e. "Fresnel equations" that should be a good starter. You have also many models on the model gallery on the main COMSOL web site
--
Good luck
Ivar
Please login with a confirmed email address before reporting spam
Posted:
1 decade ago
Hi
Thanks for that tip. I had a look through the model documentation, but I can't see how it can help me with my problem. They include a plot of reflectance/transmission but it says they just plot Ey data. That doesn't really fit my model as I have a number of wave oscillations on each side of the glass slide.
I still don't really know what is the best parameter to look for to prove Fresnel equations. Any other ideas?
Cheers.
Thanks for that tip. I had a look through the model documentation, but I can't see how it can help me with my problem. They include a plot of reflectance/transmission but it says they just plot Ey data. That doesn't really fit my model as I have a number of wave oscillations on each side of the glass slide.
I still don't really know what is the best parameter to look for to prove Fresnel equations. Any other ideas?
Cheers.