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Merged
stevengj merged 1 commit into from
Jun 8, 2018
Merged

Replace blocks with prism in mode-decomposition.py #369

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49 changes: 20 additions & 29 deletions doc/docs/Python_Tutorials/Mode_Decomposition.md
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Original file line number Diff line number Diff line change
Expand Up @@ -40,37 +40,28 @@ def main(args):
sy = dpml+dair+w2+dair+dpml
cell_size = mp.Vector3(sx,sy,0)

geometry = [ mp.Block(material=Si, center=mp.Vector3(0,0,0), size=mp.Vector3(mp.inf,w1,mp.inf)) ]
prism_x = sx + 1
half_w1 = 0.5 * w1
half_w2 = 0.5 * w2
half_Lt = 0.5 * Lt

if Lt > 0:
geometry.append(mp.Block(material=Si, center=mp.Vector3(0.5*sx-0.5*(Lt+Lw+dpml),0,0), size=mp.Vector3(Lt+Lw+dpml,w2,mp.inf)))

hh = w2
ww = 2*Lt

# taper angle (CCW, relative to +X axis)
rot_theta = math.atan(0.5*(w2-w1)/Lt)

pvec = mp.Vector3(-0.5*sx+dpml+Lw,0.5*w1,0)
cvec = mp.Vector3(-0.5*sx+dpml+Lw+0.5*ww,0.5*hh+0.5*w1,0)
rvec = cvec-pvec
rrvec = rvec.rotate(mp.Vector3(0,0,1), rot_theta)

geometry.append(mp.Block(material=mp.air, center=pvec+rrvec, size=mp.Vector3(ww,hh,mp.inf),
e1=mp.Vector3(1,0,0).rotate(mp.Vector3(0,0,1),rot_theta),
e2=mp.Vector3(0,1,0).rotate(mp.Vector3(0,0,1),rot_theta),
e3=mp.Vector3(0,0,1)))

pvec = mp.Vector3(-0.5*sx+dpml+Lw,-0.5*w1,0)
cvec = mp.Vector3(-0.5*sx+dpml+Lw+0.5*ww,-(0.5*hh+0.5*w1),0)
rvec = cvec-pvec
rrvec = rvec.rotate(mp.Vector3(0,0,1),-rot_theta)

geometry.append(mp.Block(material=mp.air, center=pvec+rrvec, size=mp.Vector3(ww,hh,mp.inf),
e1=mp.Vector3(1,0,0).rotate(mp.Vector3(0,0,1),-rot_theta),
e2=mp.Vector3(0,1,0).rotate(mp.Vector3(0,0,1),-rot_theta),
e3=mp.Vector3(0,0,1)))

vertices = [mp.Vector3(-prism_x, half_w1),
mp.Vector3(-half_Lt, half_w1),
mp.Vector3(half_Lt, half_w2),
mp.Vector3(prism_x, half_w2),
mp.Vector3(prism_x, -half_w2),
mp.Vector3(half_Lt, -half_w2),
mp.Vector3(-half_Lt, -half_w1),
mp.Vector3(-prism_x, -half_w1)]
else:
vertices = [mp.Vector3(-prism_x, half_w1),
mp.Vector3(prism_x, half_w1),
mp.Vector3(prism_x, -half_w1),
mp.Vector3(-prism_x, -half_w1)]

geometry = [mp.Prism(vertices, height=100, material=Si)]

boundary_layers = [ mp.PML(dpml) ]

# mode wavelength
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47 changes: 19 additions & 28 deletions python/examples/mode-decomposition.py
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Original file line number Diff line number Diff line change
Expand Up @@ -20,36 +20,27 @@ def main(args):
sy = dpml + dair + w2 + dair + dpml
cell_size = mp.Vector3(sx,sy,0)

geometry = [ mp.Block(material=Si, center=mp.Vector3(0,0,0), size=mp.Vector3(mp.inf,w1,mp.inf)) ]
prism_x = sx + 1
half_w1 = 0.5 * w1
half_w2 = 0.5 * w2
half_Lt = 0.5 * Lt

if Lt > 0:
geometry.append(mp.Block(material=Si, center=mp.Vector3(0.5*sx-0.5*(Lt+Lw+dpml),0,0), size=mp.Vector3(Lt+Lw+dpml,w2,mp.inf)))

hh = w2
ww = 2*Lt

# taper angle (CCW, relative to +X axis)
rot_theta = math.atan(0.5*(w2-w1)/Lt)

pvec = mp.Vector3(-0.5*sx+dpml+Lw,0.5*w1,0)
cvec = mp.Vector3(-0.5*sx+dpml+Lw+0.5*ww,0.5*hh+0.5*w1,0)
rvec = cvec-pvec
rrvec = rvec.rotate(mp.Vector3(0,0,1), rot_theta)

geometry.append(mp.Block(material=mp.air, center=pvec+rrvec, size=mp.Vector3(ww,hh,mp.inf),
e1=mp.Vector3(1,0,0).rotate(mp.Vector3(0,0,1),rot_theta),
e2=mp.Vector3(0,1,0).rotate(mp.Vector3(0,0,1),rot_theta),
e3=mp.Vector3(0,0,1)))

pvec = mp.Vector3(-0.5*sx+dpml+Lw,-0.5*w1,0)
cvec = mp.Vector3(-0.5*sx+dpml+Lw+0.5*ww,-(0.5*hh+0.5*w1),0)
rvec = cvec-pvec
rrvec = rvec.rotate(mp.Vector3(0,0,1),-rot_theta)

geometry.append(mp.Block(material=mp.air, center=pvec+rrvec, size=mp.Vector3(ww,hh,mp.inf),
e1=mp.Vector3(1,0,0).rotate(mp.Vector3(0,0,1),-rot_theta),
e2=mp.Vector3(0,1,0).rotate(mp.Vector3(0,0,1),-rot_theta),
e3=mp.Vector3(0,0,1)))
vertices = [mp.Vector3(-prism_x, half_w1),
mp.Vector3(-half_Lt, half_w1),
mp.Vector3(half_Lt, half_w2),
mp.Vector3(prism_x, half_w2),
mp.Vector3(prism_x, -half_w2),
mp.Vector3(half_Lt, -half_w2),
mp.Vector3(-half_Lt, -half_w1),
mp.Vector3(-prism_x, -half_w1)]
else:
vertices = [mp.Vector3(-prism_x, half_w1),
mp.Vector3(prism_x, half_w1),
mp.Vector3(prism_x, -half_w1),
mp.Vector3(-prism_x, -half_w1)]

geometry = [mp.Prism(vertices, height=100, material=Si)]

boundary_layers = [ mp.PML(dpml) ]

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9 changes: 8 additions & 1 deletion python/tests/mode_coeffs.py
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Original file line number Diff line number Diff line change
Expand Up @@ -23,7 +23,14 @@ def run_mode_coeffs(self, mode_num, kpoint_func):
sy = dpml + dair + w + dair + dpml
cell_size = mp.Vector3(sx, sy, 0)

geometry = [mp.Block(material=Si, center=mp.Vector3(), size=mp.Vector3(mp.inf, w, mp.inf))]
prism_x = sx + 1
prism_y = w / 2
vertices = [mp.Vector3(-prism_x, prism_y),
mp.Vector3(prism_x, prism_y),
mp.Vector3(prism_x, -prism_y),
mp.Vector3(-prism_x, -prism_y)]

geometry = [mp.Prism(vertices, height=100, material=Si)]

boundary_layers = [mp.PML(dpml)]

Expand Down