Material Data entering into COMSOL from LUMERICAL
Hi, I started using COMSOL recently, and whenever we need to add material data to it, for example, the permittivity as function of lambda we must upload an xl file with a table containing the material...
View ArticleSingle Bowtie nanoantenna
Hi, Its very easy to simulate a single (non periodic structure) bowtie nanoantenna in lumerical FDTD tool. But i find it very hard to simulate the same structure in COMSOL. Can anyone give me some...
View Article"Geometry number out of range" in comsol43a
Hi everyone, I am trying to combine the results of two different simulations and don't manage to do it. First I simulate a 3D structure, and I export in a .txt file the tangential electric field on a...
View ArticleLumped Ports on CPW
I am new to COMSOL and am modeling a coplanar waveguide. I am following a CPW example to make mine and get familiar with COMSOL, but when I execute the Boundary Mode Analysis study I get "Errors during...
View ArticleAbout optical force calculation of particles manipulated by microring resonator
Hi,everyone. I want to simulate a structure which includes two bus waveguides and one microring resonator to form an on-chip optical tweezer. One microparticle is placed in the gap area between one...
View ArticleRotation of an anisotropic material - RF waveguide
I've constructed a partially filled wave guide with an anisotropic material, cube shaped, centered within the waveguide. Is it possible to set up comsol so as when I rotate the cube within the geometry...
View ArticleVariable Frequency Microwave
Hello! I just started using COMSOL and I have been working on simulating a microwave wave guide with a dielectric material and been using a static frequency of 8.5 GHz and all my analysis related to...
View Articlesweep + Values of variables not solved for
I have a model which consists of two studies: - Study 1 : Stationary with parametric sweep of parameter A - Study 2 : Eigenmode, with parametric sweep of A, the result of Study 1 is the input for Study...
View ArticleSplit ring resonator eigenfrequency help in RF module
Please find attached my model of a U-shapped split ring resonator in COMSOL's RF module. I am somewhat of a beginner with COMSOL. The idea is to find the eigenfrequencies of the resonator, so by...
View ArticleUnable to create mesh : Error Free Tetrahedral 1
Hi everybody, I am having this error when I try to mesh a 3D structure : The following features have problems : Features : Free Tetrahedral 1 I don't find a way to have more information about this...
View ArticleAny comments on 3D wave propagation?
Hi Sergei, I found many replies from you in the forum which helped me a lot. Especially those discussion about the 3D simulation. Here, I attached a file where I want to simulate the plane wave...
View ArticlePostprocessing (Integration) of a Far Field.
Dear colleagues, SHORT QUESTION: How to integrate Far Field emw.normEfar over the solid angle defined by inclination (polar) angle theta form 0 to 60 degrees, and azimuthal angle phi from 0 to 360...
View ArticleCalculating the optical mode intensity in a particular area of fiber
I am designing a complex doped fiber and I need to calculate the optical mode intensity in a chose area. As far as I know, COMSOL provides a power flow in the study result, i.e. emw.poavz, and it seems...
View ArticleEMW error on port
Hi, I had error everytime I computed the EMW. It terminated at the beginning. Failed to evaluate variable Jacobian. - Variable: comp1.tEx - Geometry: 1 - Boundary: 56 (<--my lumped port) Have anyone...
View ArticlePML error
Hi all, Can someone point me what I do wrong? I tried to repeat Scattering from plasmonic nanosphere model, so I have Au sphere + Air domain (sphere) +PML/ABC domain (sphere). When I defining PML as...
View ArticleComputing two physics models Simultaneously
Hello, I am trying to combine MAGNETIC FIELD physics with Electromagnetic Waves, Frequency Domain physics for a Helmholtz coil application. In middle of coils is a FR4 board with transmission line on...
View ArticleUnexpected and strange 3D waveguide simulation error?
Hi all, Firstly thanks for viewing my question. I am building a simple fiber light propagation model by combining boundary mode analysis and frequency domain analysis. When the fiber core is set to be...
View ArticleCalculating EM Force in the Electromagnetic Waves (emw) Environment
Hi, This should be a very straightforward question. I would like to calculate the time-averaged electromagnetic force (via integrating the Maxwell Stress tensor over a surface). The fields that I need...
View Articleforce calculation use the Maxwell stress tensor
Hello everyone: I'm new to comsol and I have some questions as follows: I have a model for force calculation of nanorod structure by the Maxwell stress tensor. I use the expression as "emw.dnTx" to...
View ArticleError results when optical fiber in 2D axisymmetric model
Hi, Since the 2D axisymmetric model is in Cylindrical System and the optical fiber I am designing is symmetric by z-axis, so I would like to use 2D axisymmetric model to implement my fiber. Does anyone...
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