> On Nov 23, 2020, at 11:21 PM, Mandy Xia <m...@cornell.edu> wrote:
>
> Thank you Ardavan and Steven! These helped a lot! One question regarding
> covering the whole wavelength x incident angle domain: I noticed that in the
> tutorial example
> (https://meep.readthedocs.io/en/latest/Python_Tutorials/Basics/#angular-reflectance-spectrum-of-a-planar-interface
>
> <https://meep.readthedocs.io/en/latest/Python_Tutorials/Basics/#angular-reflectance-spectrum-of-a-planar-interface>),
> in each run we set k_point to be k =
> mp.Vector3(math.sin(theta_r),0,math.cos(theta_r)).scale(fmin). My
> understanding of using fmin is that this makes sure for all the wavelengths
> the mapped theta angles are well defined, but this will leave some part of
> the domain uncovered as shown in the bottom left plot in the example. I was
> wondering if it is OK to use fmax instead and in that case, whether the
> frequencies whose mapped thetas are undefined i.e. k.x/freqs[i] > 1 will
> cause issues. Thank you!
That shouldn't be a problem. For freq > kx, it just means that the source is
producing evanescent waves.
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