?? waveguidebend_triangularlattice.txt
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# This is an example of the input file for 2D FDTD transmission
#calculations.
# A 60 degree waveguide bend in a triangular lattice of air holes.
#:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
#------------------------------------------------Prepared by Dr. Min Qiu
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#Calculate the TM or TE modes??
# ==0: TE modes
# ==1: TM modes
0
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#Define the materials used in the calculations.
#:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
#The number of materials
3
#:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
#The dielectric constant, and conductivity of each material
#Index---dielectric constant---conductivity
1 1.0000 0.00E+0 #air
2 10.5000 0.00E+0 #InP/GaInAsP (n=3.24)
3 1.0000 0.00E+0 #could be lossy air
#:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
#End of material definition.
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#define the size of the computational domain
#:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
#--- lattice constant (For normalized purpose)
1.0
#:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
#The size of the computational domain.
#---Sx-------Sy--
54.0 34.0
#:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
#Background materials index
2
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#Absorbing boundary condition (ABC)
#:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
#ABC type: =0 All surrounded by PML; =1 Only the Y direction surrounded
#by PML, while periodic BC in the X direction.
#---ABC type----------------------------------------------------------
0
#:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
#---number of PML layers in X----in Y---------The exponent index for PML
12 12 2.0
#:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
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#Define parameters for FDTD
#:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
#----Dx---------Dy------
0.05 0.05
#:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
#Dt coefficient. Dt=Dt_coe*1/sqrt(1/(Dx*Dx)+1/(Dy*Dy))/vc
#Should be less than 1.0.
#For example, 0.95 or 0.866 are all good choices.
#---Dt_Coe---
0.95
#:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
#Number of total time steps
50000
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#Output the z-field component in some time steps.
#For snapshot purpose.
#If interval is less than 1, no output.
# The current z-field distribution is always stored in "Fieldz_Bin.dat".
#----Start Time steps---------End Time steps------Interval--------------
20 10000 -20
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#define the inclusions, could be waveguides, cylinders, ...
#-----------------------------------------------------------------------
#Inclusion type:
# == 1: ellipse
# == 2: quadrilateral
# == 3: triangular
#:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
#The total number of inclusions
8
#:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
#Inclusion No. 1, circles, layer down 1
#Inclusion Type ----Material index----
1 3
#-----Rx---------Ry---------Xc---------Yc--------Theta--
0.36 0.36 16.00 0.86603 0.0
#-----Mx--------Lx--------My--------Ly------Alpha-----(For Repeat)
30 1.00 30 1.73205 0.0
#:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
#Inclusion No. 2, circles, layer down 2
#Inclusion Type ----Material index----
1 3
#-----Rx---------Ry---------Xc---------Yc--------Theta--
0.36 0.36 16.50 1.73205 0.0
#-----Mx--------Lx--------My--------Ly------Alpha-----(For Repeat)
29 1.00 30 1.73205 0.0
#:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
#Inclusion No. 3, waveguide down
#Inclusion Type ----Material index----
1 2
#-----Rx---------Ry---------Xc---------Yc--------Theta--
0.50 0.50 16.50 5.19618 0.0
#-----Mx--------Lx--------My--------Ly------Alpha-----(For Repeat)
20 1.00 1 1.0 0.0
#:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
#Inclusion No. 4, waveguide bend
#Inclusion Type ----Material index----
1 2
#-----Rx---------Ry---------Xc---------Yc--------Theta--
0.36 0.36 35.50 5.19618 0.0
#-----Mx--------Lx--------My--------Ly------Alpha-----(For Repeat)
1 1.00 20 1.0 -30.0
#:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
#Inclusion No. 5, rectangular, left air
#Inclusion Type ----Material index----
2 1
#---X1------Y1------X2------Y2------X3-------Y3------X4------Y4---------
-1.0 -1.0 -1.0 63.0 15.5 63.0 15.5 -1.0
#---Mx-----Lx-----My-----Ly----Alpha---(For Repeat)
1 0.00 1 0.00 0.0
#:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
#Inclusion No. 6, rectangular, left ridge
#Inclusion Type ----Material index----
2 2
#---X1------Y1------X2------Y2------X3-------Y3------X4------Y4---------
-1.0 4.39618 -1.0 5.99618 15.6 5.99618 15.6 4.39618
#---Mx-----Lx-----My-----Ly----Alpha---(For Repeat)
1 0.00 1 0.00 0.0
#:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
#Inclusion No. 7, rectangular, right air
#Inclusion Type ----Material index----
2 1
#---X1------Y1------X2------Y2------X3-------Y3------X4------Y4---------
45.5 -1.0 45.5 43.0 80.0 43.0 80.0 -1.0
#---Mx-----Lx-----My-----Ly----Alpha---(For Repeat)
1 0.00 1 0.00 0.0
#:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
#Inclusion No. 8, rectangular, right ridge
#Inclusion Type ----Material index----
2 2
#---X1------Y1------X2------Y2------X3-------Y3------X4------Y4---------
45.4 20.05075 45.4 23.25075 55.4 40.5714 55.4 37.3714
#---Mx-----Lx-----My-----Ly----Alpha---(For Repeat)
1 0.00 1 0.00 0.0
#:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
#Examples of Triangular
#Inclusion Type ----Material index----
# 3 1
#---X1------Y1------X2------Y2------X3-------Y3---
# 10.5 0.0 24.5 3.964 16.0 9.964
#---Mx-----Lx-----My-----Ly----Alpha---(For Repeat)
# 1 0.00 1 0.00 0.0
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#Source part
#-----------------------------------------------------------------------
# For source type: ==1 point source
# ==2 line source, direction, from P1 to P2, in P3
# ==3 waveguide mode source
#:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
#----Number of Source------------
1
#:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
#Point Source Examples
#---Source Type------Source frequency (a/lambda)---Pulse Width (Delta_w)-
# 1 0.305 0.007
#----XS-----YS-------- (Point source position)
# 4.0 6.06218
#:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
#Gaussian Line Source sample
#For line source, direction == +1(X); -1(-X); +2(+Y); -2(-Y);
#---Source Type------Source frequency (a/lambda)---Pulse Width (Delta_w)-
# 2 0.25 0.1
#----direction---XS-----YS-----Beam Width---Material Type----Theta-------
# 1 9.00 6.06218 2.0 2 0.0
#:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
#Waveguide Source sample
#For Waveguide source, direction == +1(X); -1(-X); +2(+Y); -2(-Y);
#---Source Type------Source frequency (a/lambda)---Pulse Width (Delta_w)-
# 3 0.295 0.007
#----direction---XS-----YS-----Waveguide Width---Mode Number-----------
# 1 1.00 6.06218 2.60 1
#---Material Up (Left)----Material Core----Material Down (Right)-------
# 1 2 1
#:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
#Waveguide Source sample
#For Waveguide source, direction == +1(X); -1(-X); +2(+Y); -2(-Y);
#---Source Type------Source frequency (a/lambda)---Pulse Width (Delta_w)-
3 0.25 0.10
#----direction---XS-----YS-----Waveguide Width---Mode Number-----------
1 1.00 5.19618 1.60 1
#---Material Up (Left)----Material Core----Material Down (Right)-------
1 2 1
#:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
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#detectors definition
#-----------------------------------------------------------------------
# For detector type: ==1 point detector
# ==2 line detector
# direction == +1(X); -1(-X); +2(+Y); -2(-Y);
#:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
#FT frequency range and points in between
#-W_min---------W_max-------NF---
0.10 0.40 301
#:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
#----Number of Detector------------
4
#:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
#Detector No. 1, a Line detector, right input
#---Detector Type-----Starting Time Steps-----Ending Time Steps--------
2 0 1500
#----direction-----Xc-------Yc---------Length-------
1 2.0 5.19618 4.00
#:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
#Detector No. 2, a Line detector, right input
#---Detector Type-----Starting Time Steps-----Ending Time Steps--------
2 0 300000
#----direction-----Xc-------Yc---------Length-------
1 50.0 30.0 5.00
#:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
#Detector No. 3, a Line detector, right input
#---Detector Type-----Starting Time Steps-----Ending Time Steps--------
2 0 300000
#----direction-----Xc-------Yc---------Length-------
2 50.0 30.0 5.00
#:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
#Detector No. 4, a Line detector, right input
#---Detector Type-----Starting Time Steps-----Ending Time Steps--------
2 1500 300000
#----direction-----Xc-------Yc---------Length-------
1 2.0 5.19618 4.00
#:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
#Point Detector Example
#---Detector Type-----Starting Time Steps-----Ending Time Steps--------
# 1 0 500000
#-----Xc--------Yc-------
# 11.00 6.06218
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