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#!/usr/bin/env python3
# /// script
# requires-python = ">=3.10"
# dependencies = ["bornagain>=25,<26"]
# ///
"""
Depth profile of an opaque sample.
"""
import bornagain as ba
ba.require_versions("bornagain>=25,<26")
from bornagain import deg, nm
# beam data
ai_min = 0 # minimum incident angle
ai_max = 1*deg # maximum incident angle
wl = 0.03*nm # wavelength
# depth position span
z_min = -400*nm
z_max = 100*nm
def get_sample():
# Define materials
vac_color = (0.90, 0.93, 0.97)
vac_mat = ba.RefractiveMaterial("Vac", vac_color, 0, 0)
a_color = (0.05, 0.62, 0.55)
a_mat = ba.RefractiveMaterial("A", a_color, 1e-5, 3e-6)
# Define layers
layer_top = ba.Layer(vac_mat)
layer_1 = ba.Layer(a_mat, 300*nm)
layer_bot = ba.Layer(vac_mat)
# Define sample
sample = ba.Sample()
sample.addLayer(layer_top)
sample.addLayer(layer_1)
sample.addLayer(layer_bot)
return sample
def get_simulation(sample):
"""
Returns a depth-probe simulation.
"""
nz = 500
na = 5000
scan = ba.AlphaScan(na, ai_min, ai_max)
scan.setWavelength(wl)
footprint = ba.FootprintSquare(0.01)
scan.setFootprint(footprint)
z_axis = ba.EquiDivision("z (nm)", nz, z_min, z_max)
simulation = ba.DepthprobeSimulation(scan, sample, z_axis)
return simulation
if __name__ == '__main__':
sample = get_sample()
simulation = get_simulation(sample)
result = simulation.simulate()
ba.showSample3D(sample, sample_size=500*nm, seed=0)
ba.plot_datafield(result, intensity_min=2.5e-91, intensity_max=4,
frame_aspect=1.618)
# Customize colorbar ticks
import numpy as np
fig = ba.plt.gcf()
if len(fig.axes) > 1:
cbar_ax = fig.axes[1] # Colorbar axes
ticks = [1, 1e-15, 1e-30, 1e-45, 1e-60, 1e-75, 1e-90]
cbar_ax.yaxis.set_ticks(ticks)
ba.plt.show()
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