Spectral current extract data

[ams_nanolab]

Hi I want to plot spectral current data in different colors for different bias (form the I-V plot) , so I need to extract the data in multiple columns, but I can't get it in that format. Can you help how to extract the data so I have different data sets for each bias point?

[ams_nanolab]

Please reply.

[zh]

 Your question looks confused.

"The I-V plot" of a given device configuration is only one curve, i.e., Current versus bias voltage if no gate voltage is applied.

Please refer to here:
https://quantumwise.com/documents/tutorials/latest/ATKTutorialDevice/index.html/chap.iv.html

[ams_nanolab]

I-V is a singla plot. however if I check the additional plot options I get curves like dI/dV , spectral current and transmissions. It is those plots in spectral current I want to get the data of.

[Jess Wellendorff]

Attached is a very simple script for plotting the spectral currents from an IVCurve calculation. Should be easy to modify the color scheme according to your preferences.

[ams_nanolab]

How can this script be modified to consider only selected/ specified biases. I have bias 0 to 2 Volt in steps of 0.2 V but need spectral density upto only 1.0 V.
My python isn't very good so help will be appreciated.

[Jess Wellendorff]

One option is to make a list with the indices of the bias points you want to consider, and only plot data corresponding to those indices:

Code

indices = [0,1,4,7]
for i,bias,spectrum in zip(range(len(biases)),biases,transmission_spectra):
    if i in indices:
        x = spectrum.energies().inUnitsOf(eV)
        y = spectrum.spectralCurrent().inUnitsOf(Units.A/eV)
        pylab.plot(x, y*1.e3, label="%.1f V" % bias)

[ams_nanolab]

Thanks