1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
|
#!/usr/bin/env python3
# /// script
# requires-python = ">=3.10"
# dependencies = ["bornagain>=25,<26"]
# ///
"""
Hexagonal lattice of hemispherical holes in a substrate
"""
import bornagain as ba
ba.require_versions("bornagain>=25,<26")
from bornagain import deg, nm
def get_sample():
"""
Substrate with hemispherical holes arranged in a hexagonal lattice.
The holes are vacuum half-spheres suspended from the substrate top interface.
"""
# Materials
substrate_color = (0.28, 0.57, 0.82)
substrate_mat = ba.RefractiveMaterial("Substrate", substrate_color, 6e-6, 2e-8)
vacuum = ba.Vacuum()
# Hemispherical hole (vacuum half-sphere, spanning from -R to 0)
R = 5*nm
ff = ba.SphericalSegment(R, R, 0) # radius, top_cut=R, bottom_cut=0
hole = ba.Particle(vacuum, ff)
# Hexagonal lattice
lattice = ba.HexagonalLattice2D(20*nm, 0)
layout = ba.Crystal2D(hole, lattice)
profile = ba.Profile2DCauchy(100*nm, 100*nm, 0)
layout.setDecayFunction(profile)
# Layers
vacuum_layer = ba.Layer(vacuum)
substrate_layer = ba.Layer(substrate_mat)
substrate_layer.suspend2D(layout)
substrate_layer.setNumberOfSlices(6)
# Sample
sample = ba.Sample()
sample.addLayer(vacuum_layer)
sample.addLayer(substrate_layer)
return sample
def get_simulation(sample):
beam = ba.Beam(1e9, 0.1*nm, 0.2*deg)
n = 200
detector = ba.SphericalDetector(n, -2*deg, 2*deg, n, 0, 2*deg)
simulation = ba.ScatteringSimulation(beam, sample, detector)
return simulation
if __name__ == '__main__':
sample = get_sample()
ba.showSample3D(sample, sample_size=250*nm, seed=0)
simulation = get_simulation(sample)
result = simulation.simulate()
ba.plot_datafield(result, unit_aspect=1)
ba.plt.show()
|
BornAgain
≻ git-develop
≻ Documentation ≻ Examples ≻ GISAS ≻ Structures and correlations ≻ Holes lattice
