Learning Forum

[pm796]

I am running a simulation in a cuboid. The XYZ origin is at the centroid of the cuboid. I have two FD monitors, one in the XY plane (plan view) and one one in the YZ (end) plane, both passing through the origin (as highlighted in the red boxes on the green cuboid in the bottom left panel of screenshot 2 below). Looking at the point where the two orthogonal planes intersect (highlighted by red boxes on the screenshots), I am confused as to why at the point where the two slices intersect, the XY results clearly show the E field vectors diverging through the boundaries, but the YZ shows the field vectors at the same point converging. Does anyone know what is happening here, am I missing something?

 

As an aside, does anyone know if there is any more information on how to interpret results, units, etc in the 'visualiser' panes? The 'reference manual' is quite lacking. Also, the font on the chart in the visualiser is unreadably small - is there any way to change that?

Thanks for your help! 

Phil

 

 

[Amrita Pati]

Hello,

The polarization of electric field is in 3D. So, when this is projected to the 2D XY and YZ monitor planes, the projections might be different. Please feel free to let me know in case you have any further questions. 

In the future, I will recommend posting in the Ansys-Photonics Channel, which is dedicated for Lumerical related questions. Thank you!

Regards,
Amrita

[pm796]

 

Hi Amrita, thanks for your reply. I am aware the projection is in 3D space, which is why I shared two orthogonal slices. If you refer to the slices which I have displayed, you will observe there is a contradiction between them in the regions where they intersect (the limitations of R3 space simply prohibit the vectors from diverging through a boundary in one projection, and converging through the same boundary when viewed from an orthogonal axis). Anyone have any ideas why this is?

Good advice about posting to the photonics forum – I have also done that (the Ansys support site is extremely disorganised so it’s hard to know what is what and where to post things)

Thanks

 

[Amrita Pati]

That makes sense. I am not sure about the reason behind the discrepancy yet. It could be due to something simple, like the data not having enough resolution or the fact that the vector plot only considers the real component of the field. I will test this later today and let you know if I find something.

Thanks for the feedback on the forum! I agree that it could be confusing with so many different channels. I will pass this along to the right pwople.

Regards,
Amrita

[pm796]

Thanks for your reply! Look forward to hearing what you find.

Yes, wrt the forums; I already posted this on the 'Photonics' forum, and it got closed(twice) as a duplicate of this one, which makes no sense since the other one is in the photonics forum and it's a photonics question. There's also a tab in this website called 'My posts' which for some reason does not display any of the posts I make in the forums (weirdly), but does allow me to post a text-only post to an unknown destination. Thanks for feeding this back to the relevant people!

Phil

[pm796]

Anyone have any more ideas about this one? Thanks