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
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
|
import unittest
import meep as mp
# Material function that recreates the ellipsoid-in-cylinder configuration of
# examples/cyl-ellipsoid.py
def my_material_func(p):
R1X = 0.5
R1Y = 1.0
R2 = 3.0
x = p.x
y = p.y
# test for point inside inner ellipsoid
if (x**2 / (R1X**2) + y**2 / (R1Y**2)) < 1.0:
nn = 1.0
elif (x**2 / (R2**2) + y**2 / (R2**2)) < 1.0:
nn = 3.5
else:
nn = 1.0
return mp.Medium(epsilon=nn**2)
def my_epsilon_func(p):
R1X = 0.5
R1Y = 1.0
R2 = 3.0
x = p.x
y = p.y
if (x**2 / (R1X**2) + y**2 / (R1Y**2)) < 1.0:
return 1.0
elif (x**2 / (R2**2) + y**2 / (R2**2)) < 1.0:
return 3.5
return 1.0
class TestUserMaterials(unittest.TestCase):
def setUp(self):
self.resolution = 10
self.cell = mp.Vector3(10, 10)
self.symmetries = [mp.Mirror(mp.X), mp.Mirror(mp.Y)]
self.boundary_layers = [mp.PML(1.0)]
self.sources = [mp.Source(src=mp.GaussianSource(0.2, fwidth=0.1),
component=mp.Ez, center=mp.Vector3())]
def test_user_material_func(self):
sim = mp.Simulation(cell_size=self.cell,
resolution=self.resolution,
symmetries=self.symmetries,
boundary_layers=self.boundary_layers,
sources=self.sources,
material_function=my_material_func)
sim.run(until=200)
fp = sim.get_field_point(mp.Ez, mp.Vector3(x=1))
self.assertAlmostEqual(fp, 4.816403627871773e-4 + 0j)
def test_epsilon_func(self):
sim = mp.Simulation(cell_size=self.cell,
resolution=self.resolution,
symmetries=self.symmetries,
boundary_layers=self.boundary_layers,
sources=self.sources,
epsilon_func=my_epsilon_func)
sim.run(until=100)
fp = sim.get_field_point(mp.Ez, mp.Vector3(x=1))
self.assertAlmostEqual(fp, -7.895783750440999e-4 + 0j)
def test_geometric_obj_with_user_material(self):
geometry = [mp.Cylinder(5, material=my_material_func)]
sim = mp.Simulation(cell_size=self.cell,
resolution=self.resolution,
symmetries=self.symmetries,
geometry=geometry,
boundary_layers=self.boundary_layers,
sources=self.sources)
sim.run(until=200)
fp = sim.get_field_point(mp.Ez, mp.Vector3(x=1))
self.assertAlmostEqual(fp, 4.816403627871773e-4 + 0j)
def test_geometric_obj_with_epsilon_func(self):
geometry = [mp.Cylinder(5, epsilon_func=my_epsilon_func)]
sim = mp.Simulation(cell_size=self.cell,
resolution=self.resolution,
symmetries=self.symmetries,
geometry=geometry,
boundary_layers=self.boundary_layers,
sources=self.sources)
sim.run(until=100)
fp = sim.get_field_point(mp.Ez, mp.Vector3(x=1))
self.assertAlmostEqual(fp, -7.895783750440999e-4 + 0j)
if __name__ == '__main__':
unittest.main()
|
