RF module Mie scattering tutorial (gold sphere)
www.comsol.com/showroom/gallery/3459/ I obtained the absorption cross-section and scattering cross-section,but i want to obtain absorption coefficient and scattering coefficient ? what to do next?...
View ArticlePlasmonic Resonance of Gold Nanoparticle
Hi all, I'm trying to model the plasmonic response of a gold nanoparticle in the presence of an electric field. I've got a model of a Au nanoparticle in a circular domain surrounded by PML layer and...
View Article"Line current (out of plane)" and "Electric point dipole" power
Dear All, I do 2D simulations of multilayered structures. I am using "Line current (out of plane)" or "Electric point dipole" as sources. I would like to know how can I set the value of I0 and the...
View ArticleHow to force COMSOL to find plasmonic modes of a waveguide instead of all...
Dear All, I use electromagnetics eigenfrequency modal analysis to find plasmonic modes of a circular metalic waveguide whose radial pattern is in modified bessel form, but I know that the structure...
View ArticleExporting Far-field Polar plots data
I would like to export the Far-Field Polar plots data. When I tried to export , I cant plot similar to Polar plots in COMSOL. Any suggestions. It will be really helpful. Thank you.
View ArticleIs there an easy way to create a high number of geometric components with a...
Hi all, I am using COMSOL 4.3 to simulate a 2D photonic crystal waveguide made of air holes in a dielectric (using the emw study of the RF module), and I wish to look at how roughness around the holes...
View ArticleSetting up an internal port in RF Module
Here is my problem:i.imgur.com/stPvMwc.png See how two arrows are pointing inward whereas the rest of the structure is pointed outwards? That is one continuous boundary, so I have no idea why the...
View Articlex and y polarization calculation
Hi all, I am doing Photonic Crystal Fiber project. I want to analyze the birefringence, for that how can I calculate the the effective indexes in x and y polarization method? I think it is with post...
View ArticleCoaxial feed with slot antenna
Hi everyone! I need to connect the coaxial feed with a slot antenna...I used a parametric surface as you can see in the picture but it doesn't work...How can I solve the problem? Thank you In the...
View Articlehow to couple two different physics?
Hi Dear friend I am using Physics "Transient heat diffusion equation in solid" to calculate T(x,y,z,t). Now another Physics "Distributed ODEs and DAEs(dode)" is used to write the following equation:...
View Articleplot Slice of whole field for system of symmetry
Dear all, I am trying to use emw to calculate the scattering field of a nanoparticle. I truncated the 3D model to a quarter according to symmetry, now how can I plot the whole field rather than a...
View ArticleHow to apply both voltage and current simultaneously to the cable?
Hi, everyone, I build a model to study the magnetic field and electrical field of two cables. I have the voltage data and current data. But how can I apply both voltage and current simultaneously to...
View ArticleWhy does an example on comsol website use 13W power for a cellphone?
Hello all, I'm new to comsol, i have been learning it by internet, i have started solving some examples available on comsol website. The link of the example is mentioned...
View Articleag nanoparticle cross section
Dear all, I am trying to use FEM in COMSOL to calculate extinction/absorption/scattering cross section of a ag nanoparticle. I basically followed the process on www.youtube.com/watch?v=8u4pNpf0N2o....
View ArticleFinding Photonic Bandgap Curve
Hi, I am trying to model a photonic crystal fiber to exihibit photonic bandgap. But i don't know how to get the PBG curve. Can anyone help me plz? I also want to know how to operate multiple wavelength...
View ArticleUnit syntax error, not sure why
This is likely something very obvious but I can't figure it out. I'm trying to define a variable: omega0 = e_const*hbar_const*sqrt(fermienergy/W) fermienergy has units joules and W has units of...
View ArticleFar field of dipole antenna on substrate
Dear COMSOL community I try to model a nanodipole antenna on glass substrate , first I create a model for a nanodipole in air and the far field seems good to me ( the tours shape typical for dipole...
View ArticleError using Polarization in Transient EM wave problems
Hello, I cannot understand the reason for the following error. The following simple 2D transient EM problem (temw) is solved with COMSOL 4.3: a pulse enters a rectangular domain from left (boundary...
View ArticleTransmission line and scattering parameters
Hello. I want to model a transmission line and put some solutions above and compute the s-parameter variations. Can anybody help me if there are any PDF and applications that are useful? Thanks,
View ArticleCoaxial Probe in Concrete
Hi, I am very new to COMSOL I was wondering how you would model a coaxial probe in concrete sample and see the wave propagation through the concrete? Thanks a lot!
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