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import unittest
import meep as mp
class TestHoleyWvgBands(unittest.TestCase):
def setUp(self):
cell = mp.Vector3(1, 12)
b = mp.Block(size=mp.Vector3(mp.inf, 1.2, mp.inf), material=mp.Medium(epsilon=13))
c = mp.Cylinder(0.36)
self.fcen = 0.25
self.df = 1.5
s = mp.Source(
src=mp.GaussianSource(self.fcen, fwidth=self.df),
component=mp.Hz,
center=mp.Vector3(0.1234)
)
sym = mp.Mirror(direction=mp.Y, phase=-1)
self.sim = mp.Simulation(
cell_size=cell,
geometry=[b, c],
sources=[s],
symmetries=[sym],
boundary_layers=[mp.PML(1, direction=mp.Y)],
resolution=20
)
def test_run_k_points(self):
all_freqs = self.sim.run_k_points(5, mp.interpolate(19, [mp.Vector3(), mp.Vector3(0.5)]))
expected = [
(0.1942497850393511, 0.001381460274205755),
(0.19782709203322993, -0.0013233828667934015),
(0.1927618763491877, 0.001034260690735336),
(0.19335527231544278, 4.6649450258959025e-4)
]
self.assertTrue(any(l for l in all_freqs))
for (r, i), f in zip(expected, all_freqs[17:21][0]):
self.assertAlmostEqual(r, f.real)
self.assertAlmostEqual(i, f.imag)
def test_fields_at_kx(self):
self.sim.k_point = mp.Vector3(3.5)
h = mp.Harminv(mp.Hz, mp.Vector3(0.1234), self.fcen, self.df)
self.sim.run(mp.after_sources(h), until_after_sources=300)
expected = [
(0.19990240131986522, 3.8522735413802275e-8),
(0.3050067740183294, 4.720168254531566e-7),
(0.4396104226078593, 1.6233300291010948e-6),
(0.4582004346509184, 4.7150006592976396e-7),
(0.5006556112859917, -0.0014396635723422887),
(0.7405953267896378, -4.553109069353934e-5),
(0.7627621012715363, -0.006700351645723407),
(0.8243404528365005, -5.174379068176951e-4),
(0.8255990399390389, -0.0016256261502000271),
(0.9494859645499801, -0.005325208458639275),
(0.9726561278186849, -0.0031192234222098274),
(0.9855957702101914, -0.003945157134867143),
]
self.assertTrue(h.modes)
for (r, i), m in zip(expected, h.modes):
self.assertAlmostEqual(m.freq, r)
self.assertAlmostEqual(m.decay, i)
if __name__ == '__main__':
unittest.main()
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