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#!/usr/bin/env python3
# /// script
# requires-python = ">=3.10"
# dependencies = ["bornagain>=25,<26"]
# ///
"""
GISAS of sawtooth ripples on a 2D paracrystal lattice.
SawtoothRippleBox (100 x 20 x 10 nm, asymmetry d=-3 nm) rotated 30 deg
around Z, arranged on a BasicLattice2D (20 x 100 nm, 90 deg angle,
30 deg rotation) using Paracrystal2D with Gaussian pair-distance
distributions (sigma=150 x 600 nm, orientation 0 deg).
"""
import math
import bornagain as ba
ba.require_versions("bornagain>=25,<26")
from bornagain import deg, nm
def get_sample():
particle_color = (0.86, 0.24, 0.18)
particle_mat = ba.RefractiveMaterial("Particle", particle_color, 6e-4, 2e-8)
substrate_color = (0.28, 0.57, 0.82)
substrate_mat = ba.RefractiveMaterial("Substrate", substrate_color, 6e-6, 2e-8)
vacuum = ba.Vacuum()
length_ripple = 100*nm
ff = ba.SawtoothRippleBox(length_ripple, 20*nm, 10*nm, -3*nm)
particle = ba.Particle(particle_mat, ff)
particle.rotate(ba.RotationZ(math.pi/6))
lattice = ba.BasicLattice2D(20*nm, length_ripple, math.pi/2, math.pi/6)
structure = ba.Paracrystal2D(particle, lattice, 1000*nm, 1e4*nm, 1e4*nm)
profile = ba.Profile2DGauss(150*nm, 600*nm, 0)
structure.setProbabilityDistributions(profile, profile)
vacuum_layer = ba.Layer(vacuum)
substrate_layer = ba.Layer(substrate_mat)
vacuum_layer.deposit2D(structure)
sample = ba.Sample()
sample.addLayer(vacuum_layer)
sample.addLayer(substrate_layer)
return sample
def get_simulation(sample):
beam = ba.Beam(1, 0.1*nm, 0.2*deg)
n = 100
detector = ba.SphericalDetector(n, -2*deg, 2*deg, n, 0, 2*deg)
return ba.ScatteringSimulation(beam, sample, detector)
if __name__ == '__main__':
sample = get_sample()
ba.showSample3D(sample, sample_size=1000*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 ≻ Sawtooth ripple
