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 progress(i):
progress = 0
for j in pbar(range(N)):
if i in (2, 5, 8) and j == 40:
raise RuntimeError
sleep(T / N)
yield dict()
def force_gmmt():
wavelengths = np.linspace(400 * nm, 1000 * nm, 100)
# eps = meep_ext.get_eps(material)(wavelengths)
# Au = miepy.data_material(wavelengths, eps)
material = miepy.constant_material(3.5**2)
particles = [
miepy.cube([-sep / 2, 0, 0], 200 * nm, material),
miepy.cube([sep / 2, 0, 0], 200 * nm, material)
]
F1 = np.zeros((3, ) + wavelengths.shape, dtype=float)
F2 = np.zeros((3, ) + wavelengths.shape, dtype=float)
for i, wavelength in enumerate(pbar(wavelengths)):
c = miepy.cluster(particles=particles,
source=miepy.sources.plane_wave([1, 0]),
wavelength=wavelength,
lmax=4)
q = miepy.quaternion.from_spherical_coords(0, 0)
c.update(orientation=[q, q])
F1[:, i] = c.force_on_particle(1)
q = miepy.quaternion.from_spherical_coords(0, np.pi / 4)
c.update(orientation=[q, q])
F2[:, i] = c.force_on_particle(1)
return dict(wavelengths=wavelengths, F1=F1, F2=F2)
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()
def make_vid():
var = job.load(sim)
traj = var.pos[::10]
for i in pbar(range(len(traj))):
pov_content = make_pov_file(traj[i] / (100 * nm))
with open('om.pov', 'w') as f:
f.write(pov_content)
command = ['povray', 'Width=600 Height=600 om.pov', f'-Oimg/img_{i+1}']
proc = subprocess.run(command, capture_output=True)
return dict()
def sim():
cluster = miepy.sphere_cluster(position=initial,
radius=radius,
material=Ag,
source=source,
wavelength=wavelength,
medium=water,
lmax=2)
bd = stoked_from_cluster_2d(cluster, dt=dt, temperature=300)
for i in pbar(range(Nsteps)):
if i % 10 == 0:
yield dict(pos=bd.position)
bd.step()
def sim():
drag = stoked.drag_sphere(75*nm, 8e-4)
A = 2e-20
k = 2*np.pi*1.33/(800*nm)
# sep = 600*nm
# initial = [[-sep/2, 0, 0], [sep/2, 0, 0]]
# amplitude = [1,1]
# phase = [0, .3]
phase = np.zeros(len(initial), dtype=float)
amplitude = np.ones(len(initial), dtype=float)
order = np.arange(len(initial)).astype(int)
np.random.shuffle(order)
size = int(len(initial)//4)
idx1 = order[:size]
idx2 = order[size:2*size]
idx3 = order[2*size:3*size]
idx4 = order[3*size:]
phase[idx2] = .5
phase[idx3] = 1
phase[idx4] = 1.5
amplitude[idx2] = 1.3
amplitude[idx3] = 1.6
amplitude[idx4] = 1.9
bd = stoked.brownian_dynamics(temperature=300,
dt=5*us,
position=initial,
drag=drag,
force=partial(harmonic_force, stiffness=.3e-8),
interactions=[nonrec_force(A, amplitude, phase, k),
stoked.double_layer_sphere(75*nm, -77e-3)])
yield once(idx2=idx2, idx3=idx3, idx4=idx4)
for i in pbar(range(Nsteps)):
if i % 10 == 0:
yield dict(pos=bd.position)
bd.step()
def gmt_sim():
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 = []
# orientation = miepy.quaternion.from_spherical_coords(theta[i], phi[i])
particles.append(miepy.cube([0,0,0], W, material=Au, orientation=q))
for i, wavelength in enumerate(pbar(wavelengths)):
sol = miepy.cluster(particles=particles,
source=miepy.sources.plane_wave([1,0]),
wavelength=wavelength,
lmax=4)
C[i], A[i], E[i] = sol.cross_sections()
return dict(wavelengths=wavelengths, C=C, A=A, E=E)
def sim():
for i in pbar(range(100)):
yield dict(counter=i)
sleep(1)