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import unittest
import meep as mp
def f(r, ex, hz, eps):
return (r.x * r.norm() + ex) - (eps * hz)
def f2(r, ez1, ez2):
return ez1.conjugate() * ez2
class TestFieldFunctions(unittest.TestCase):
cs = [mp.Ex, mp.Hz, mp.Dielectric]
vol = mp.Volume(size=mp.Vector3(1), center=mp.Vector3())
def init(self):
resolution = 20
cell = mp.Vector3(10, 10, 0)
pml_layers = mp.PML(1.0)
fcen = 1.0
df = 1.0
sources = mp.Source(src=mp.GaussianSource(fcen, fwidth=df), center=mp.Vector3(),
component=mp.Ez)
symmetries = [mp.Mirror(mp.X), mp.Mirror(mp.Y)]
return mp.Simulation(resolution=resolution,
cell_size=cell,
boundary_layers=[pml_layers],
sources=[sources],
symmetries=symmetries)
def init2(self):
n = 3.4
w = 1
r = 1
pad = 4
dpml = 2
sxy = 2 * (r + w + pad + dpml)
cell = mp.Vector3(sxy, sxy)
geometry = [
mp.Cylinder(radius=r + w, height=mp.inf, material=mp.Medium(index=n)),
mp.Cylinder(radius=r, height=mp.inf, material=mp.air)
]
pml_layers = [mp.PML(dpml)]
resolution = 5
fcen = 0.118
df = 0.010
sources = [mp.Source(src=mp.GaussianSource(fcen, fwidth=df), component=mp.Ez,
center=mp.Vector3(r + 0.1))]
symmetries = [mp.Mirror(mp.Y)]
return mp.Simulation(cell_size=cell,
resolution=resolution,
geometry=geometry,
boundary_layers=pml_layers,
sources=sources,
symmetries=symmetries)
def test_integrate_field_function(self):
sim = self.init()
sim.run(until=200)
res1 = sim.integrate_field_function(self.cs, f)
res2 = sim.integrate_field_function(self.cs, f, self.vol)
self.assertAlmostEqual(res1, complex(-6.938893903907228e-18, 0.0))
self.assertAlmostEqual(res2, 0.0j)
sim.output_field_function("weird-function", self.cs, f)
def test_integrate2_field_function(self):
sim = self.init2()
sim.run(until_after_sources=10)
fields2 = sim.fields
sim.reset_meep()
sim.run(until_after_sources=10)
res1 = sim.integrate2_field_function(fields2, [mp.Ez], [mp.Ez], f2)
self.assertAlmostEqual(res1, 0.17158099566244897)
def test_max_abs_field_function(self):
sim = self.init()
sim.run(until=200)
self.cs = [mp.Ex, mp.Hz, mp.Dielectric]
res = sim.max_abs_field_function(self.cs, f, self.vol)
self.assertAlmostEqual(res, 0.27593732304637586)
if __name__ == '__main__':
unittest.main()
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