def force_gmmt():
wavelengths = np.linspace(400 * nm, 1000 * nm, 100)
eps = meep_ext.get_eps(material)(wavelengths)
Au = miepy.data_material(wavelengths, eps)
# Au = miepy.constant_material(3.5**2)
# Au = miepy.materials.Au()
particles = []
for i in range(9):
orientation = miepy.quaternion.from_spherical_coords(theta[i], phi[i])
particles.append(
miepy.cylinder(position=[x[i], y[i], z[i]],
radius=radius,
height=height,
material=Au,
orientation=orientation))
F = np.zeros([3, 9, len(wavelengths)], dtype=float)
for i, wavelength in enumerate(pbar(wavelengths)):
sol = miepy.cluster(particles=particles,
source=miepy.sources.plane_wave([1, 0]),
wavelength=wavelength,
lmax=4)
F[..., i] = sol.force()
# if i == 0:
# miepy.visualize(sol)
return dict(wavelengths=wavelengths, force=F)
def vis():
fig, ax = plt.subplots()
norm = job.load(norm_sim)
scat = job.load(scat_sim)
ax.plot((1 / nm) / norm.frequency,
scat.scattering / norm.incident * norm.area,
'o',
color='C0',
label='scattering (FDTD)')
ax.plot((1 / nm) / norm.frequency,
scat.absorption / norm.incident * norm.area,
'o',
color='C1',
label='absorption (FDTD)')
ax.plot((1 / nm) / norm.frequency,
(scat.scattering + scat.absorption) / norm.incident * norm.area,
'o',
color='C2',
label='extinction (FDTD)')
wavelengths = np.linspace(400 * nm, 1000 * nm, 100)
eps = meep_ext.get_eps(material)(wavelengths)
Au = miepy.data_material(wavelengths, eps)
# Au = miepy.constant_material(3.5**2)
C, A, E = [np.zeros_like(wavelengths) for i in range(3)]
particles = []
for i in range(9):
orientation = miepy.quaternion.from_spherical_coords(theta[i], phi[i])
particles.append(
miepy.cylinder(position=[x[i], y[i], z[i]],
radius=radius,
height=height,
material=Au,
orientation=orientation))
for i, wavelength in enumerate(pbar(wavelengths)):
sol = miepy.cluster(particles=particles,
source=miepy.sources.plane_wave([1, 0]),
wavelength=wavelength,
lmax=3)
C[i], A[i], E[i] = sol.cross_sections()
ax.axhline(0, linestyle='--', color='black')
ax.plot(wavelengths / nm, C, color='C0', label='scattering (GMT)')
ax.plot(wavelengths / nm, A, color='C1', label='absorption (GMT)')
ax.plot(wavelengths / nm, E, color='C2', label='extinction (GMT)')
ax.legend()
ax.set(xlabel='wavelength (nm)', ylabel='cross-section')
plt.show()