Plot of Time Average Electric Field
Using the optical/RF module, when plotting the variable ewfd.Ex (x componente of electric field), do we see the time averaged value of the field OR a snapshot in time of the field distribution?...
View ArticleModeling a Gaussian beam
Hello everyone, could somebody explain to me why in the COMSOL example "Nanorods" the equation for the incoming electric field (a z-polarized gaussian beam in 2D) reads...
View ArticleError occuring while uploding Comsol file in discussion forum
Hello, I am trying to upload Comsol file in discussion forum,but 'file extension error' is occuring while uploading.Please help me for this error.
View ArticleBig problem--- Microring Resonator
Hi,everyone, I built a 2D micro-ring resonator model which stated in one publicated paper. I check all the parameters I set are same as the paper mentioned. But the problem is , even in the ring, no...
View ArticleGraded Index Waveguide
Hi all, I'm trying to model a graded Index Waveguide (for instance a diffused waeguide) in Comsol 4.4. I'm was more familiar with Comsol 3.5 where I could enter the expression for my graded index...
View ArticleMicrowave problem.
Hello I use in project, (EWEB) Electromagnetic Waves Beam Envelopes and study frequency domain. But the project I report to me work the opposite. If the working frequency is higher the value of the...
View ArticleEditing Parametric Sweeps
Hi all, I created this model to test the effectiveness of AntiReflective Coatings. I wanted to modify this so that it can check results over a wide variety of wavelengths as well as angles. Can anyone...
View ArticleElectromagnet (Electromagnetic needle)
I am trying to model an "electromagnetic needle" that is relatively simple, but I want to be able to adjust parameters and optimize geometry, There will be somewhere in the range of 1,000 turns of...
View Articleparameters names must not be empty
Hey, again, this is an error I ha with comsol 4.3: parameters names must not be empty I need a quick help attached is my comsol file, you just need to run it and see the error. and also i attached a...
View ArticleQuestion about Scatterer on Substrate Example
Hello everybody, I have a question about scatterer on substrate example. The Structure is simple: a metal scatterer on Si substrate. Since I have just seen that scattering, absorption, and extinction...
View ArticleRadiation distribution of a 2D (two dimensional space) dipole source
hi, everyone In standard textbook, a 3D dipole radiate like a donut (that is E~sin(\theta)), anyone know the field distribution of a 2D dipole? with dipole moment either in plane or out of plane? Can...
View ArticleOptical torque
Sergei, do you know how to calculate optical torque based on Maxwell stress tensor?
View ArticleUsing interpolation functions to define material properties
The following example from the model library models absorbed radiation in the human head:www.comsol.com/model/absorbed-...on-sar-in-the-human-brain-2190 Rather than directly representing each subdomain...
View ArticleQ factor in RF module
i have try different version Comsol to calculate the optics Q factor of silicon microdisk. why different version will get different Q. the Q factor in Comsol 4.3 is much larger than the result in...
View ArticleIrregular grating modeling using ports or background field
Dear all, I am a novice at comsol and has been building my first model for some time. I want to calculate the scattered field caused by a plane wave incident upon an irregular grating (with dozens of...
View ArticleMagnetic induction
hello, I am a newbie of COMSOL. I am trying to simulate magnetic induction with RF frequency between two metal rods. I am fail to induce a current, Can someone kindly give me some advices? Details are...
View ArticleVirtual Family (Anatomical Models for Electromagnetic Exposure)
Does anyone have experience with the Virtual Family models:www.itis.ethz.ch/services/anatomical-models/overview/ They are human anatomical models developed for the evaluation of electromagnetic...
View ArticleProblem with max field calculation
Hi. I have a resonator inside background media. I use PML around. I am looking at a particular mode. Then I can find the maximum of normE field which is inside the resonator. Now if I change the size...
View ArticleMicrowave Model
Hi all, I'm trying to heat the kernel using microwave and study the moisture and temperature effects. Varying the input power for my electromagnetic wave does not affect my temperature, which is weird....
View ArticleElectron-hole dynamics in Si-Nanowires
Dear all, I would like to run a simulation for Si nanowires illuminated by an IR beam to see steady state responses of electrons and holes such as distributions, currents and so on. I know how to use...
View Article