from scipy.constants import c, epsilon_0, mu_0
import meep_utils, meep_materials, metamaterial_models
from meep_utils import in_sphere, in_xcyl, in_ycyl, in_zcyl, in_xslab, in_yslab, in_zslab, in_ellipsoid
import meep_mpi as meep
#import meep
# Model selection
model_param = meep_utils.process_param(sys.argv[1:])
model = metamaterial_models.models[model_param.get('model', 'default')](**model_param)
## Initialize volume, structure and the fields according to the model
vol = meep.vol3d(model.size_x, model.size_y, model.size_z, 1./model.resolution)
vol.center_origin()
s = meep_utils.init_structure(model=model, volume=vol, pml_axes=meep.Z)
f = meep.fields(s)
# Define the Bloch-periodic boundaries (any transversal component of k-vector is allowed)
f.use_bloch(meep.X, getattr(model, 'Kx', 0) / (-2*np.pi))
f.use_bloch(meep.Y, getattr(model, 'Ky', 0) / (-2*np.pi))
# Add the field source (see meep_utils for an example of how an arbitrary source waveform is defined)
if not getattr(model, 'frequency', None): ## (temporal source shape)
#src_time_type = meep.band_src_time(model.src_freq/c, model.src_width/c, model.simtime*c/1.1)
src_time_type = meep.gaussian_src_time(model.src_freq/c, model.src_width/c)
else:
src_time_type = meep.continuous_src_time(getattr(model, 'frequency', None)/c)
srcvolume = meep.volume( ## (spatial source shape)
meep.vec(-model.size_x/2, -model.size_y/2, -model.size_z/2+model.pml_thickness),
meep.vec( model.size_x/2, model.size_y/2, -model.size_z/2+model.pml_thickness))
#f.add_volume_source(meep.Ex, src_time_type, srcvolume)
def run(self):
## TEMPORARY SETTINGS
wg_bottom = 0.7
wg_top = 0.7 + 0.22
wg_center = (wg_bottom + wg_top) / 2.
#top = 0.7 + 0.38
## preparing
po = self.property_object
self.engine.initialise_engine(self.landscape)
fields = meep.fields(self.engine.structure)
self.save_engine_dielectricum_to_file(po.eps_filename)
## Sources
print 'Center wavelength:', po.wavelength
print 'Bandwidth:', po.pulse_width
center_freq = 1.0 / (float(po.wavelength))
pulse_width_freq = (float(po.pulse_width)) / (
float(po.wavelength)) * center_freq
print 'Center frequency:', center_freq
print 'Bandwidth:', pulse_width_freq
if (po.pulsed_source):
src = meep.gaussian_src_time(center_freq, pulse_width_freq)
else:
src = meep.continuous_src_time(center_freq)
source_port_position = po.input_port.transform_copy(
Translation(translation=(po.source_input_port_offset, 0))).position
print 'wg_center_old:', wg_center
wg_center = (po.input_port.wg_definition.process.wg_upper_z_coord +
po.input_port.wg_definition.process.wg_lower_z_coord) / 2.
print 'wg_center_new:', wg_center
c = Coord3(source_port_position[0], source_port_position[1], wg_center)
print 'coord:', c
source_position_vec = self.make_meep_vec(c)
fields.add_point_source(meep.Ey, src, source_position_vec)
## 2D Cross section volumes
for oc in po.output_cuts:
fn = '%s_eps.h5' % oc.filename
vol = oc.get_output_volume(self.engine.meepVol)
f_eps = meep.prepareHDF5File(fn)
fields.output_hdf5(meep.Dielectric, vol, f_eps)
del f_eps
system('h5topng %s' % fn)
### Fluxplanes
self.fluxes = []
for p in po.output_ports:
pp = p.position
port_width = p.wg_definition.wg_width
wg_bottom = p.wg_definition.process.wg_lower_z_coord
wg_top = p.wg_definition.process.wg_upper_z_coord
## Be aware: this is only for ports along y-axis!!
vec_near = self.make_meep_vec(
Coord3(pp[0], pp[1] - port_width / 2.0, wg_bottom))
vec_far = self.make_meep_vec(
Coord3(pp[0], pp[1] + port_width / 2.0, wg_top))
fluxplane = meep.volume(vec_near, vec_far)
fx = fields.add_dft_flux_plane(
fluxplane, center_freq - (pulse_width_freq / 4.0),
center_freq + (pulse_width_freq / 4.0), po.dft_terms)
self.fluxes.append(fx)
## Reverse one of the fluxes if necessary
if po.load_reversed_flux_from_file_ID > -1:
self.fluxes[po.load_reversed_flux_from_file_ID].load_hdf5(
fields, po.load_reversed_flux_from_file_filename)
if (po.pulsed_source):
stop = po.stop_time_multiplier * fields.last_source_time()
else:
stop = po.stop_time
print 'Simulation will run for', stop, 'time units'
output_files = []
for oc in po.output_cuts:
fn = '%s.h5' % oc.filename
oc_file = meep.prepareHDF5File(fn)
output_files.append(oc_file)
i = 0
n_o_output = 0
while (fields.time() < stop):
if (i > po.output_steps):
j = 0
for oc in po.output_cuts:
vol = oc.get_output_volume(self.engine.meepVol)
fields.output_hdf5(meep.Ey, vol, output_files[j], 1)
j += 1
n_o_output += 1
i = 0
fields.step()
i += 1
print n_o_output, 'images outputted'
print 'Outputting field images..'
del output_files[:]
for oc in po.output_cuts:
fn = '%s.h5' % oc.filename
fn_eps = '%s_eps.h5' % oc.filename
st = 'h5topng -t 0:%d -R -Zc dkbluered -a yarg -A %s %s' % (
n_o_output - 1, fn_eps, fn)
print st
system(st)
print 'Outputting done!'
#print 'obtaining fluxes:'
self.flux_data = []
for i in range(len(po.output_ports)):
fd = meep.getFluxData(self.fluxes[i])
self.flux_data.append(fd)
#print fd
## Save flux data if necesarry
if po.save_reversed_flux_to_file_ID > -1:
fx = self.fluxes[po.save_reversed_flux_to_file_ID]
fx.scale_dfts(-1)
fx.save_hdf5(fields, po.save_reversed_flux_to_file_filename)
return
from scipy.constants import c, epsilon_0, mu_0
import meep_utils, meep_materials, metamaterial_models
from meep_utils import in_sphere, in_xcyl, in_ycyl, in_zcyl, in_xslab, in_yslab, in_zslab, in_ellipsoid
import meep_mpi as meep
#import meep
# Model selection
model_param = meep_utils.process_param(sys.argv[1:])
model = metamaterial_models.models[model_param.get('model', 'default')](**model_param)
## Initialize volume, structure and the fields according to the model
vol = meep.vol3d(model.size_x, model.size_y, model.size_z, 1./model.resolution)
vol.center_origin()
s = meep_utils.init_structure(model=model, volume=vol, pml_axes=meep.Z)
f = meep.fields(s)
# Define the Bloch-periodic boundaries (any transversal component of k-vector is allowed)
f.use_bloch(meep.X, getattr(model, 'Kx', 0) / (-2*np.pi))
f.use_bloch(meep.Y, getattr(model, 'Ky', 0) / (-2*np.pi))
# Add the field source (see meep_utils for an example of how an arbitrary source waveform is defined)
if not getattr(model, 'frequency', None): ## (temporal source shape)
#src_time_type = meep.band_src_time(model.src_freq/c, model.src_width/c, model.simtime*c/1.1)
src_time_type = meep.gaussian_src_time(model.src_freq/c, model.src_width/c)
else:
src_time_type = meep.continuous_src_time(getattr(model, 'frequency', None)/c)
srcvolume = meep.volume( ## (spatial source shape)
meep.vec(-model.size_x/2, -model.size_y/2, -model.size_z/2+model.pml_thickness),
meep.vec( model.size_x/2, model.size_y/2, -model.size_z/2+model.pml_thickness))
#f.add_volume_source(meep.Ex, src_time_type, srcvolume)
eps_matrix = numpy.absolute(
eps_matrix / numpy.amax(eps_matrix))**2 * modulation
print(eps_matrix[10, 10])
# grating = numpy.abs(eps_matrix) ** 2
# plt.figure(1)
# plt.imshow(_eps_matrix, cmap='hot', extent=[0, gridSizeX, 0, gridSizeY])
# plt.colorbar()
# plt.show()
meep.master_printf("Setting the material matrix...\n")
self.set_matrix_2D(eps_matrix, vol)
# self.setMatrix(grating)
self.stored_eps_matrix = eps_matrix # to prevent the garbage collector from cleaning up the matrix...
meep.master_printf("MeepMaterial object initialized.\n")
meep.set_EPS_Callback(epsilon().__disown__())
struct = meep.structure(vol, EPS, no_pml())
fld = meep.fields(struct)
fld.add_volume_source(Ex, gaussian_src_time(freq_read / c, 1.5e9 / c), vol)
while fld.time() / c < 30e-15:
fld.step()
meep.print_f.get_field(Ex, meep.vec(0.5e-6, 0.5e-6, 3e-6))
meep.del_EPS_Callback()
