Lumerical FDTD for Periodic Structures (Metasurfaces)

This is a quick and unplanned tutorial of how to setup a Lumerical simulation to calculate the reflectance and transmittance of a periodic structure. This includes Fresnel reflection, thin films, and metasurfaces/metalenses.
Let me know if you have any questions in the comments below.

[@MRF77]

My duuuuuude! No question, except only to say how awesome you are! Please continue, doesn't have to be polished video! This is the best practical FDTD tutorials on the internet!

[@simenew1]

I really appreciate you! I followed all your tutorials with regards FDTD scattering problem and this videos' I have got a lot of idea about how can we simulate and design plasmonic Nano particles.

[@lamphanhuu8363]

Hello, thank you so much for your tutorial. It is easy to understand the metasurface. Could you make another video to simulate a full metalens using FDTD numerical? Thank you so much in advance!

[@jonasplanopsim5567]

dear @lam Phan Huru, you might want to consider PlanOpSim as well
th-cam.com/video/L4FIQC3JhAY/w-d-xo.html

[@nanzheng7022]

thank you for the tutorial, this is great for a beginner

[@dinosgiannios742]

Truely grateful bro, hope you're doing well! thank you thank you

[@mr.subratsahu6052]

Wonderful explanation. Excellent video.

[@MdNasimAfrojTaj]

you are really good at this. keep going

[@bennymorris6107]

Hello, thank you for this tutoriel it is very helpful. How could you substract the contribution of the dielectric from the transmission graph in order to only measure the transmittance by the nanoparticle and thin film?

[@kevinortunomula4369]

Outstanding video!!. I only was wondering if it was possible for you to share the Power Point presentation because it would be awesome. Anyway, thanks very much for the tutorial.

[@abhishekpaul5823]

Great Video!! I was wondering if you could share your research group's name so I can look up further into your research works :))

[@user-rm1lq4kd3t]

Its useful,thanks a lot,bro.

[@ahmedfardy3509]

it is applicable for multilayer immersed in water ?

[@achmadfajarputranto4916]

Thanks so much bud! It is very useful

[@hpars]

Hello. Thanks a lot for the tutorial

[@Durgeshkumar-hn5qt]

Please make a full video on solar cell simulation using Lumerical.Thank you

[@computationalnanophotonics9545]

I'm afraid solar cells are beyond my expertise. But what I do know is that they are usually just thin film stacks. You may not even need lumerical for that. You can easily write a Transfer Matrix Method code to do this.
That said, I will be making a video on Transfer Matrix Method in the future!

[@muctebaalgul1511]

@@computationalnanophotonics9545 Can you make a video for thin film solar cell example please...

[@bananannnnful]

Thank you sensei ~:)

[@pascalcheng6973]

Hello, thank you for your very well done simulation, I have been doing simulation for few months, a question regarding the result that we get, the reflection and the transmittance. Is there a way to obtain at the end the scattering, the absorption and the extinction of the system ? if Yes could you please explain the process ?

[@nowshinakhtary6790]

Why did you put the source far from the metal but in the previous video the source penetrate the radius?

[@kolesto2316]

If I am not mistaking, you could have used doubled symmetric/ anti-symmetric boundary conditions to reduce the time of the simulation and still get a periodic structure?

[@areeghasan9367]

Thanks for the nice explanation, my question is, if I did similar thing then I wanted to examine one unit cell only what should I do?

[@ions347]

Can you share your fsp file?
I want to practice any example fsp file 😢

[@iqrarhussain6953]

hello Sir video file are not saving what step should do to save video?

[@lilsvideos1365]

There is a problem in one of my monitors, it gives me a diagram which min and max is 16 while other gives me diagram between 0_1

[@techhutbd954]

Is it possible to get external quantum efficiency curve from Lumerical FDTD, or possible to get current density in case of absorption?

[@forhadmojumder2595]

my visualizer"s background is got dark and distorted.. how can i solve it? please help...

[@anilkumarpal2096]

Thank you so much.

[@jabiralhujaifa]

Bro, please make more videos.

[@lilsvideos1365]

Thanks for awsome tutorial, i have some questions how i could ask them?

[@vaverdugo2]

very useful !

[@rawatrohan]

Can you explain how can we see the wavefront of the transmitted wave?
Thank you in advance

[@nancy-6941]

Hey
Can you tell how to deal with engine error while running simulations?

[@samarfawzy7240]

Thank you so much, I have a question, the reflection minimum comes out at around 280nm when I put the wavelength 200-700, but when I use 150-700 it shifts to around 320 nm! any idea why is this happening? and what should i do if I want to use a larger bandwidth for the simulation?

[@sumaiyajahantabassum1267]

I have a similar problem. Did you figure out why this happens?

[@hamzaasifkhan8421]

can u please try metasurfaces in CST

[@sasha99aspidov]

Hello, thank you very much for this exhaustively clear tutorial! I have a question, is it possible to set a state of polarization of an incident light and then analyze the polarization after the metasurface cell? Thanks :)

[@computationalnanophotonics9545]

Of course! In the plane wave source, you can set the polarization state. In the transmission power monitor, you can analyze each component of the electric field individually. Using that, you can determine the polarization state.
For example, if you send in x-polarized light, you can measure how much is converted to y-polarization by simply looking at the y-component of the field in the power monitor,

[@sasha99aspidov]

@@computationalnanophotonics9545 thank you very much :)

[@freemotionbyfirozhasan6247]

Make a video on Photonic crystal base optical filter plz
Mail me TH-cam like