def fig13b():
"""
Silicon layer bounded by two semi infinite air claddings.
"""
# Create structure
st = SPE()
# st.add_layer(1e3, si)
st.add_layer(1900, sio2)
st.add_layer(100, si)
st.add_layer(20, sio2)
st.add_layer(100, si)
st.add_layer(1e3, air)
st.set_vacuum_wavelength(lam0)
st.info()
# Calculate spontaneous emission over whole structure
result = st.calc_spe_structure_guided()
z = result['z']
spe = result['spe']
# Convert z into z/lam0 and center
z = st.calc_z_to_lambda(z)
# Plot spontaneous emission rates
fig = plt.figure()
ax1 = fig.add_subplot(111)
ax1.plot(z, spe['TE'], label=r'$\Gamma^{\mathrm{TE}}$')
ax1.plot(z, spe['TM_p'], label=r'$\Gamma^{\mathrm{TM}}_∥$')
ax1.plot(z, spe['TM_s'], label=r'$\Gamma^{\mathrm{TM}}_⊥$')
ax1.plot(z, spe['avg'], label=r'total')
ax1.legend()
# Plot layer boundaries
for z in st.get_layer_boundaries()[:-1]:
ax1.axvline(st.calc_z_to_lambda(z), color='k', lw=1, ls='--')
ax1.set_ylim(0, 16)
ax1.set_xlim(0, 0.5)
# ax1.set_title('The spatial dependence of the normalized spontaneous emission rate \n'
# 'into leaky modes for asymmetric Silicon waveguide (SiO2/Si/air).')
ax1.set_ylabel('$\Gamma / \Gamma_0$')
ax1.set_xlabel('z/$\lambda$')
if SAVE:
plt.savefig('../Images/creatore_fig13b')
plt.show()
def fig8():
# Create structure
st = SPE()
st.add_layer(1.5 * lam0, sio2)
st.add_layer(lam0, si)
st.add_layer(1.5 * lam0, air)
st.set_vacuum_wavelength(lam0)
st.info()
# Do Simulation
result = st.calc_spe_structure_guided()
z = result['z']
spe = result['spe']
# Convert z into z/lam0 and center
z = st.calc_z_to_lambda(z)
# Plot results
fig, (ax1, ax2) = plt.subplots(2, 1, sharex='col', sharey='none')
ax1.plot(z, spe['TE'], label='TE')
ax1.plot(z, spe['TM_p'], label='TM')
ax1.plot(z, spe['TE'] + spe['TM_p'], label='TE + TM')
ax2.plot(z, spe['TM_s'], label='TM')
for z in st.get_layer_boundaries()[:-1]:
z = st.calc_z_to_lambda(z)
ax1.axvline(x=z, color='k', lw=1, ls='--')
ax2.axvline(x=z, color='k', lw=1, ls='--')
ax1.set_ylim(0, 4)
ax2.set_ylim(0, 5)
ax1.set_title(
'The spatial dependence of the normalized spontaneous emission rate \n'
'into guided modes for asymmetric Silicon waveguide (SiO2/Si/air).')
ax1.set_ylabel('$\Gamma / \Gamma_0$')
ax2.set_ylabel('$\Gamma /\Gamma_0$')
ax2.set_xlabel('z/$\lambda$')
ax1.legend(title='Horizontal Dipoles', fontsize='small')
ax2.legend(title='Vertical Dipoles', fontsize='small')
fig.tight_layout()
if SAVE:
plt.savefig('../Images/creatore_fig8')
plt.show()
def fig5():
# Create structure
st = SPE()
st.add_layer(1.5 * lam0, air)
st.add_layer(lam0, si)
st.add_layer(1.5 * lam0, air)
st.set_vacuum_wavelength(lam0)
st.info()
result = st.calc_spe_structure_guided()
z = result['z']
spe = result['spe']
# Convert z into z/lam0 and center
z = st.calc_z_to_lambda(z)
fig, (ax1, ax2) = plt.subplots(2, 1, sharex='col', sharey='none')
ax1.plot(z, spe['TE'], label='TE')
ax1.plot(z, spe['TM_p'], label='TM')
ax1.plot(z, spe['TE'] + spe['TM_p'], label='TE + TM')
ax2.plot(z, spe['TM_s'], label='TM')
for z in st.get_layer_boundaries()[:-1]:
ax1.axvline(st.calc_z_to_lambda(z), color='k', lw=1, ls='--')
ax2.axvline(st.calc_z_to_lambda(z), color='k', lw=1, ls='--')
# ax1.set_ylim(0, 4)
# ax2.set_ylim(0, 6)
ax1.set_title('Spontaneous Emission Rate. Core n=3.48, Cladding n=1.')
ax1.set_ylabel('$\Gamma / \Gamma_0$')
ax2.set_ylabel('$\Gamma /\Gamma_0$')
ax2.set_xlabel('z/$\lambda$')
size = 12
ax1.legend(title='Horizontal Dipoles', prop={'size': size})
ax2.legend(title='Vertical Dipoles', prop={'size': size})
fig.tight_layout()
if SAVE:
plt.savefig('../Images/creatore_fig5')
plt.show()