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import unittest
from meep.materials import Al
import meep as mp
class TestAbsorber(unittest.TestCase):
def setUp(self):
resolution = 40
cell_size = mp.Vector3(z=10)
absorber_layers = [mp.Absorber(1, direction=mp.Z)]
sources = [
mp.Source(
src=mp.GaussianSource(1 / 0.803, fwidth=0.1),
center=mp.Vector3(),
component=mp.Ex,
)
]
self.sim = mp.Simulation(
cell_size=cell_size,
resolution=resolution,
dimensions=1,
default_material=Al,
boundary_layers=absorber_layers,
sources=sources,
)
def test_absorber(self):
self.sim.run(
until_after_sources=mp.stop_when_fields_decayed(
50, mp.Ex, mp.Vector3(), 1e-6
)
)
f = self.sim.get_field_point(mp.Ex, mp.Vector3())
self.assertAlmostEqual(f.real, 3.218846961494622e-13, places=6)
def test_absorber_2d(self):
source = mp.Source(
src=mp.GaussianSource(frequency=0.1, fwidth=0.1),
component=mp.Hz,
center=mp.Vector3(),
)
sim = mp.Simulation(
cell_size=mp.Vector3(20, 20, 0),
resolution=10,
sources=[source],
boundary_layers=[mp.Absorber(5)],
)
sim.run(until_after_sources=1000)
v = mp.Vector3(4.13, 3.75, 0)
p = sim.get_field_point(mp.Hz, v)
self.assertAlmostEqual(-4.058476603571745e-11, p.real)
if __name__ == "__main__":
unittest.main()
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