I'm working on 1.55um waveguides with one or two bilayer or trilayer graphene layer. I have a MATLAB code that calculate refractive index of graphene and I use that calculated refractive index to calculate waveguide different modes neff(effective mode index). My problem is that my calculated indexes and absorptions are not similar to a source that I'm using specially in trilayer graphene waveguides. Is there special way to simulate graphene in COMSOL and how I should simulate bi & trilayer graphene in COMSOL?
I attached one of my simulated file corresponding to fig5.19b in the source
my source: Finite Element Characterisation of Graphene-Silicon Hybrid Waveguides by S.N.Mathivanan University of London
Dear Matin,
sorry to see that your very interesting technical question has not yet received any expert answers. As a synthetic inorganic chemist I'm unfortunately not an expert in this field enough to give you a qualified explanation. Perhaps the following potentially useful article might help you in your analysis:
Gate-controlled topological conducting channels in bilayer graphene
Article Gate-controlled topological conducting channels in bilayer graphene
This paper has been posted by the authors as public full text on RG. Thus you can freely download it as pdf file. The same is true for the following related article:
Models for Simulation Based Selection of 3D Multilayered Graphene Biosensors
(see attached pdf file)
In my experience it often pays off to directly search the "Publications" section of RG to find and access helpful literature. Similarly, you can search the "Questions" section of RG to find closely related questions such as this one:
How to simulate Graphene with Comsol Multiphysics 5.2
https://www.researchgate.net/post/How_to_simulate_Graphene_with_Comsol_Multiphysics_52
(6 answers)
Good luck with your work and best wishes!
Frank T. Edelmann Thank you professor for recommendation and answer
extra explanation:
I have no problem modeling graphene. The MATLAB code is able to calculate single, bi & trilayer graphene primitivity, refractive index and conductivity with no problem. My issue is in COMSOL that calculated effective mode index is not same as my reference.
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