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#!/usr/bin/env python3
# /// script
# requires-python = ">=3.10"
# dependencies = ["bornagain>=25,<26"]
# ///
"""
Depth-probe simulation of a Ti/Ni multilayer on a Si substrate.
Computes intensity as function of incident angle alpha and depth z
for a 10-bilayer TiNi stack. Compare Depthprobe1.py which uses a
single-layer sample.
"""
import bornagain as ba
ba.require_versions("bornagain>=25,<26")
from bornagain import deg, nm
def get_sample():
vacuum = ba.Vacuum()
substrate_color = (0.28, 0.57, 0.82)
substrate_mat = ba.RefractiveMaterial(
"Si_substrate", substrate_color, 7.81e-7, 0)
ni_color = (0.93, 0.48, 0.14)
ni_mat = ba.RefractiveMaterial("Ni", ni_color, 3.557e-6, 0)
ti_color = (0.05, 0.62, 0.55)
ti_mat = ba.RefractiveMaterial("Ti", ti_color, -7.36e-7, 0)
n_repetitions = 10
stack = ba.LayerStack(n_repetitions)
stack.addLayer(ba.Layer(ti_mat, 3*nm))
stack.addLayer(ba.Layer(ni_mat, 7*nm))
sample = ba.Sample()
sample.addLayer(ba.Layer(vacuum))
sample.addStack(stack)
sample.addLayer(ba.Layer(substrate_mat))
return sample
def get_simulation(sample):
n = 100
scan = ba.AlphaScan(n, 0.025*deg, 0.975*deg)
scan.setWavelength(1*nm)
z_axis = ba.EquiDivision("z (nm)", n, -100*nm, 100*nm)
return ba.DepthprobeSimulation(scan, sample, z_axis)
if __name__ == '__main__':
sample = get_sample()
simulation = get_simulation(sample)
result = simulation.simulate()
ba.showSample3D(sample, sample_size=180*nm, seed=0)
ba.plot_datafield(result, intensity_min=1e-2, intensity_max=1e1)
ba.plt.show()
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