File: material_dispersion.py

package info (click to toggle)
meep-openmpi 1.7.0-3
  • links: PTS, VCS
  • area: main
  • in suites: buster
  • size: 25,828 kB
  • sloc: cpp: 27,370; python: 10,574; lisp: 1,213; makefile: 437; sh: 28
file content (60 lines) | stat: -rw-r--r-- 1,530 bytes parent folder | download | duplicates (8)
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
from __future__ import division

import unittest
import numpy as np
import meep as mp


class TestMaterialDispersion(unittest.TestCase):

    def test_material_dispersion_with_user_material(self):
        susceptibilities = [
            mp.LorentzianSusceptibility(frequency=1.1, gamma=1e-5, sigma=0.5),
            mp.LorentzianSusceptibility(frequency=0.5, gamma=0.1, sigma=2e-5)
        ]

        def mat_func(p):
            return mp.Medium(epsilon=2.25, E_susceptibilities=susceptibilities)

        fcen = 1.0
        df = 2.0

        sources = mp.Source(
            mp.GaussianSource(fcen, fwidth=df),
            component=mp.Ez,
            center=mp.Vector3()
        )

        kmin = 0.3
        kmax = 2.2
        k_interp = 5

        kpts = mp.interpolate(k_interp, [mp.Vector3(kmin), mp.Vector3(kmax)])

        self.sim = mp.Simulation(
            cell_size=mp.Vector3(),
            geometry=[],
            sources=[sources],
            material_function=mat_func,
            default_material=mp.air,
            resolution=20
        )

        all_freqs = self.sim.run_k_points(200, kpts)
        res = [f.real for fs in all_freqs for f in fs]

        expected = [
            0.1999342026399106,
            0.41053963810375294,
            0.6202409070451909,
            0.8285737385146619,
            1.0350739448523063,
            1.2392775309110078,
            1.4407208712852109,
        ]

        np.testing.assert_allclose(expected, res)


if __name__ == '__main__':
    unittest.main()