Hello! Does the paid course on EMpossible provide lessons about oblique coordinates for the efficient 3D PWEM? Is the convmat constructed there valid for hexagoonal, FCC and BCC types of periodicities?
Yes. I have made it standard practice to always implement oblique grids because the codes can then handle any symmetry including hexagonal, cubic, etc. You will come away with codes that can calculating anything, as well as a understanding of how to simulate anything with them. Good luck and have fun!
Hello, I am looking to model 2D PCs and I am trying to compare methods so that I can get the most from my efforts, as well as something that is transferable to other work. I am interested in the mode or field profiles within the structure, as well as the photonic band diagrams. I noticed that this is possible with this method. I open for any considerations, but I wanted to ask for your advice on which method to consider (PWEM, RCWA, MoM, etc.). I am also interested in applying optimization to this problem, so this may be a consideration. Do you have any recommendations on where to start?
If you are calculating band diagrams of photonic crystals, PWEM is the method to use unless your photonic crystals have very high permittivity contrast or metals. In this case, I would recommend finite-difference frequency-domain (FDFD). If you are simulating scattering from 2D photonic crystals, the best method depends on what you are simulating. Are you simulating propagation through a photonic crystal slab? If so, RCWA is probably the best unless you have high permittivity contrast or metals. In this case, I would suggest finite-difference method or finite element analysis. If you are simulating a 2D photonic crystal slab and the wave is travelling in the plane of the slab, I would recommend FDFD or finite-difference time-domain (FDTD).
@@empossible1577 Great thanks. This was very useful. To be specific, my goal is to simulate photonic crystal lasers (PCSELs). So this is a 2D PC that could be etched into a DBR. So mode control and field confinement are important. Band diagrams will help to know the band structure for lasing.
Thank you for your lectures! I think the idea of 2D Representation of 3D Slab Photonic Crystals is very interesting and very useful. But, what if my 3D Photonic Crystal has a region where there is no guided mode? Then should I just use 3D PWEM simulation inevitably?
For example, as in (11:15), I have three layers (let's say it's air, SiN, and SiO2) but there are just air and SiO2 in holes(air holes) which means there is no guided mode.
Hello! Does the paid course on EMpossible provide lessons about oblique coordinates for the efficient 3D PWEM? Is the convmat constructed there valid for hexagoonal, FCC and BCC types of periodicities?
Yes. I have made it standard practice to always implement oblique grids because the codes can then handle any symmetry including hexagonal, cubic, etc. You will come away with codes that can calculating anything, as well as a understanding of how to simulate anything with them.
Good luck and have fun!
Hello, I am looking to model 2D PCs and I am trying to compare methods so that I can get the most from my efforts, as well as something that is transferable to other work. I am interested in the mode or field profiles within the structure, as well as the photonic band diagrams. I noticed that this is possible with this method. I open for any considerations, but I wanted to ask for your advice on which method to consider (PWEM, RCWA, MoM, etc.). I am also interested in applying optimization to this problem, so this may be a consideration. Do you have any recommendations on where to start?
If you are calculating band diagrams of photonic crystals, PWEM is the method to use unless your photonic crystals have very high permittivity contrast or metals. In this case, I would recommend finite-difference frequency-domain (FDFD).
If you are simulating scattering from 2D photonic crystals, the best method depends on what you are simulating. Are you simulating propagation through a photonic crystal slab? If so, RCWA is probably the best unless you have high permittivity contrast or metals. In this case, I would suggest finite-difference method or finite element analysis.
If you are simulating a 2D photonic crystal slab and the wave is travelling in the plane of the slab, I would recommend FDFD or finite-difference time-domain (FDTD).
@@empossible1577 Great thanks. This was very useful. To be specific, my goal is to simulate photonic crystal lasers (PCSELs). So this is a 2D PC that could be etched into a DBR. So mode control and field confinement are important. Band diagrams will help to know the band structure for lasing.
Thank you for your lectures! I think the idea of 2D Representation of 3D Slab Photonic Crystals is very interesting and very useful. But, what if my 3D Photonic Crystal has a region where there is no guided mode? Then should I just use 3D PWEM simulation inevitably?
For example, as in (11:15), I have three layers (let's say it's air, SiN, and SiO2) but there are just air and SiO2 in holes(air holes) which means there is no guided mode.
When there is no guided mode, I just average the refractive indices in the slab. While not exact, it usually gets me close enough.
@@empossible1577 Ah, I'll try it. Thank you so much :D