Origin of TE and TM Modes

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5 жыл бұрын

/ edmundsj
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Transverse electric and transverse magnetic modes in waveguides both come from the same fundamental phenomenon - perfect reflection of a wave off an interface. This leads to a standing wave along one direction, and an electromagnetic field unlike that of a single propagating plane wave.
This is part of my graduate series on optoelectronics / photonics, and is based primarily on Coldren's book on Lasers as well as graduate-level coursework I have taken in the EECS department at UC Berkeley.
Hope you found this video helpful, please post in the comments below anything I can do to improve future videos, or suggestions you have for future videos.

Пікірлер: 47

@noahballou6350 3 жыл бұрын

Are you planning on becoming a professor? We need you in the classrooms, you are exceptionally good at explaining fundamentals and that is a rare talent in the school system

@LightHolmes 2 жыл бұрын

Man, your videos helped clear up a ton of things. Can't thank you enough.

@amartanshdubey9750 4 жыл бұрын

Great explanation! You should also make a video showing how waves will propagate inside the rectangular waveguide.

@zhengyangg4708 4 жыл бұрын

5:35 I believe there's a typo on your lecture slides. For the reflected Kx it should be Kx = Ko*sin(θ). Just for the future viewers. Great video as always!

@giorgosgagrinas9365 3 жыл бұрын

Yeap that it is probably right! Just commenting for anyone wondering if you are right.

@alejandroromero6464 3 жыл бұрын

True.

@VectorTutors 3 жыл бұрын

Thanks dude

@abuabdullah9878 2 жыл бұрын

thank you

@bharathchoudhary3185 4 жыл бұрын

Great Quality Explanation With Details!!

@tylergeneharrison3594 2 жыл бұрын

Electromagnetic just got fun! Best explanation I believe I have seen!

@aydogakallem6450 Жыл бұрын

Thank you for this simple and clear explanation!

@christianmierescurra6392 4 жыл бұрын

Hello Jordan, great job. I couldn't find the continuation video about TE and TM modes, if there is one. Thanks.

@GurITheGurU 2 жыл бұрын

Simply Amazing , Love your work , waiting for more on TM & TE modes. Are you planning a follow up , I am kinna stuck at TM mode analysis. 😅

@mutazshannag2353 Жыл бұрын

Amazing explanation thanks a lot for your great efforts.

@satyamdas151 3 жыл бұрын

Love the way u explained all...

@memsuniverse Жыл бұрын

Great explanation , many thanks

@aJ-sk2hf Ай бұрын

Please make a follow up of this video. Great explanation!!

@billfang3664 4 жыл бұрын

Great Video! Could you make more video related to waveguide and finding attenuation

@ayeleleka4976 Жыл бұрын

thanks for your explanations,

@pyrokinetikrlz 2 жыл бұрын

Goddammit! That was a great explanation of TE and TM waves!

@JordanEdmundsEECS 2 жыл бұрын

Thanks! :D This video came out of a conversation I had with another grad student at Berkeley, Cem, he's awesome. It makes so much more sense to me this way.

@KaptainLuis 3 жыл бұрын

omg this helps sooooo much! LOVE YOU! Thank you veeery much!!!

@JordanEdmundsEECS 3 жыл бұрын

@niklaskras5498 3 жыл бұрын

good video!

@JorgeMiraUSC 3 жыл бұрын

Great job, congratulations! What program do you use for this? I specially find useful the possibility of shifting the blackboard without deleting the previous writter work. Thanks!

@JordanEdmundsEECS 3 жыл бұрын

Autodesk sketchbook, yeah I love infinite canvases.

@Masongao 2 жыл бұрын

very clear

@kanishkakosala9078 3 жыл бұрын

Great!! Thanks man..

@samarfawzy7240 2 жыл бұрын

is it correct to say that s-polarized light will not give a TM mode? because the E field must be in the plane of incidence for the H field to be pointing at us? so it has to be p-polarized light?

@phy_dude 2 жыл бұрын

Decent content

@kevinyao7468 3 жыл бұрын

Shouldn't there be an additional term in the reflection to account for the 180 phase shift, if we are talking about microwave waveguide here?

@JordanEdmundsEECS 3 жыл бұрын

Sure, if it’s a metal.

@aloysiocamposdapaz8041 2 жыл бұрын

you are amazing

@PTNLemay 3 жыл бұрын

8:40 I find the terminology a bit confusing, because if we ask ourselves "Ok, in TE mode how are the magnetic waves propagating?" We would find them to be at right angles to the electric component and at right angles to the direction of propagation. In our volume here they would oscillate in the Z direction. This is also transverse to the direction of propagation (which I understand to be in the X direction here). I get that it's just a terminology that the industry agreed upon. But would it be false to say "In TE mode the magnetic field is also travelling transverse to the direction of propagation"?

@JordanEdmundsEECS 2 жыл бұрын

Uh, usually these modes are confined inside a waveguide, so they aren't *really* traveling at all, they are sort of stuck. In free space, this might be more correct to say.

@user-lf9xe1ln6k 7 ай бұрын

How can i determine the waveguide when be TM or TE

@Cb12500 4 жыл бұрын

If the electric or magnetic field components from the TE and TM mode goes to zero will the wave be still an EM wave?

@JordanEdmundsEECS 4 жыл бұрын

Nope. A magnetic field cannot exist without an electric field if the wave is to propagate.

@albo5194 3 жыл бұрын

@@JordanEdmundsEECS So the magnetic field does then propagate in wave direction in a TE mode right? But doesnt the poynting vektor of the wave always have to be orthogonal to both electric and magnetic field?

@kevinyao7468 3 жыл бұрын

Since the 2 cos terms are multiplied with each other, in stead of addition, maybe it's better to say it's it's a mix of standing and traveling mode?

@JordanEdmundsEECS 3 жыл бұрын

I’m confused as to why they multiply. You’re adding two waves on top of each other, and using linearity of Maxwell’s equations. You’re correct that there will both be a standing wave and a traveling wave :)p

@kevinyao7468 3 жыл бұрын

@@JordanEdmundsEECS I was talking about 2y_hatE_0cos(wt-k_xX)*cos(k_zZ) @8:22