Hi dears
I want to do the absorption of a structure for the wavelength range of 280 to 900 with the desired divisions. For example, I want the wavelength distance in this case to be 0.5 nano, in other words, it returns the absorption information every 0.5 nano.
Lumerical(FDTD) apparently does this for random wavelengths. But I want to get the absorption for wavelengths of 280 to 900 nano, at distances of 0.5 nanometers.
In other words, in the image below, I want the value of "value", 0.5 Nano 0.5 Nano change.
Is there a way to do this in Lumerical(FDTD) ?
Thanks in advance for your reply.
Motahari
Hello again
To solve the above problem,
First, enable the (''use linear wavelength spacing'') option as shown below, then pay attention to the rest of the description:
Determine the number of frequency points according to the type of divisions of your wavelength range. For example, if you want the distance to be 0.5 nano, then subtract the beginning of the interval from the end of it, then multiply by 2, and add 1 at the end.
Finally, the number of frequency points is determined.
For example, above is the number of frequency points:
(900-280)*2+1=1241
Thanks
Motahari
Dear Mohamad Reza Motahari ;
I think this can be solved by deriving a special equation related to instant situation..
Dear Mohamad Reza Motahari, it's very simple, first, you have to enable "use linear wavelength steps" from monitors setting, then you put the total number of wavelength in a way that in your desire range the steps become o.5nm as you looking for it. there is a simple formula for that
if we consider your desire steps as "dx", and the initial and final value of wavelength range called "Wi" and "Wf" respectively. then with this formula, you know how many frequency/wavelength point has t be entered at monitor setting.
number of frequency point. #f =(Wf-Wi)/(dx)+1.
do not forget to enable "use linear wavelength steps from monitors setting" do it for global monitor setting so all monitors performed with this setting.
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