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import unittest
from utils import ApproxComparisonTestCase
import meep as mp
class TestRingCyl(ApproxComparisonTestCase):
def setUp(self):
n = 3.4
w = 1
self.r = 1
pad = 4
dpml = 2
sr = self.r + w + pad + dpml
dimensions = mp.CYLINDRICAL
cell = mp.Vector3(sr, 0, 0)
m = 3
geometry = [
mp.Block(
center=mp.Vector3(self.r + (w / 2)),
size=mp.Vector3(w, mp.inf, mp.inf),
material=mp.Medium(index=n),
)
]
pml_layers = [mp.PML(dpml)]
resolution = 10
self.fcen = 0.15
self.df = 0.1
sources = [
mp.Source(
src=mp.GaussianSource(self.fcen, fwidth=self.df),
component=mp.Ez,
center=mp.Vector3(self.r + 0.1),
)
]
self.sim = mp.Simulation(
cell_size=cell,
geometry=geometry,
boundary_layers=pml_layers,
resolution=resolution,
sources=sources,
dimensions=dimensions,
m=m,
split_chunks_evenly=False,
)
def test_ring_cyl(self):
expected = [
0.11835455441250553,
-6.907792691629741e-4,
85.66741917133473,
0.025701906263451237,
-0.024027038833537524,
-0.009126302124459489,
]
h = mp.Harminv(mp.Ez, mp.Vector3(self.r + 0.1), self.fcen, self.df)
self.sim.run(mp.after_sources(h), until_after_sources=200)
m = h.modes[0]
res = [m.freq, m.decay, m.Q, abs(m.amp), m.amp.real, m.amp.imag]
tol = 1e-6 if mp.is_single_precision() else 1e-7
self.assertClose(expected, res, epsilon=tol)
if __name__ == "__main__":
unittest.main()
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