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Python interface for slanted prisms #1129
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Needs documentation as well. Note that we decided to define the |
Some strange artifacts are found in the epsilon profile of a hexagonal prism in the xy plane of a 2d cell whenever the import meep as mp
import numpy as np
import math
import matplotlib
matplotlib.use('agg')
import matplotlib.pyplot as plt
cell_size = mp.Vector3(2.5,2.5)
resolution = 50
vertices = [mp.Vector3(-1,0),
mp.Vector3(-0.5,math.sqrt(3)/2),
mp.Vector3(0.5,math.sqrt(3)/2),
mp.Vector3(1,0),
mp.Vector3(0.5,-math.sqrt(3)/2),
mp.Vector3(-0.5,-math.sqrt(3)/2)]
geometry = [mp.Prism(vertices,
height=1.5,
center=mp.Vector3(),
sidewall_angle=np.radians(15),
material=mp.Medium(index=3.5))]
sim = mp.Simulation(resolution=resolution,
cell_size=cell_size,
geometry=geometry)
sim.init_sim()
plt.figure()
sim.plot2D()
plt.savefig('prism_sidewall.png') sidewall_angle=0 sidewall_angle=np.radians(15) sidewall_angle=np.radians(27) Note that the size of the cross section is shrinking as the |
The "fuzz" around the edges looks a little suspicious, but I'm fine with merging this as an undocumented "experimental" feature. |
Artifacts along the prism boundaries also appear in 3d. import meep as mp
import numpy as np
import math
import matplotlib
matplotlib.use('agg')
import matplotlib.pyplot as plt
cell_size = mp.Vector3(3,3,3)
resolution = 50
vertices = [mp.Vector3(-1,0),
mp.Vector3(-0.5,math.sqrt(3)/2),
mp.Vector3(0.5,math.sqrt(3)/2),
mp.Vector3(1,0),
mp.Vector3(0.5,-math.sqrt(3)/2),
mp.Vector3(-0.5,-math.sqrt(3)/2)]
geometry = [mp.Prism(vertices,
axis=mp.Vector3(0,0,1),
height=1.5,
center=mp.Vector3(),
sidewall_angle=np.radians(10),
material=mp.Medium(index=3.5))]
sim = mp.Simulation(resolution=resolution,
cell_size=cell_size,
geometry=geometry)
sim.run(mp.at_beginning(mp.output_epsilon),until=0)
eps-xy.png eps-xz.png eps-yz.png |
From a discussion with @stevengj, a good idea for debugging this may be to check |
Adds
sidewall_angle
parameter to Python prism objects (defaults to zero), allowing them to interface the new slanted-prism feature in libctl 4.5 (NanoComp/libctl#53).