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How to derive the Normal derivative of a wave fuction at boundary

Posted 11 déc. 2023, 22:08 UTC−5 Electromagnetics, Wave Optics Version 6.0 1 Reply

XU Yuxuan
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Greetings!

I've performed a 2D eignvalue analysis on the distribution of magnetic field in a dielectric circular microdisk which has a refractive index of 2.21. Then, I want to get the Normal derivative of magnetic field at boundary so I calculate the expression d(laginterp(2,ewfd.Hz), y) \times ewfd.uny+d(laginterp(2,ewfd.Hz), x) \times ewfd.unx but the result seems so weird.

Is the expression correct?

Thanks a lot!

1 Reply Last Post 11 déc. 2023, 22:10 UTC−5
XU Yuxuan
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Posted: 11 months ago 11 déc. 2023, 22:10 UTC−5
Updated: 11 months ago 11 déc. 2023, 22:11 UTC−5

In addition, I set the TE polarization so Hx=Hy=0 and the expression only contains Hz.

In addition, I set the TE polarization so Hx=Hy=0 and the expression only contains Hz.

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