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The Monte Carlo MESFET simulation

You can find the following example in the official ditribution of GNU Archimedes in the test/MESFET directory.

# Silicon MESFET test-1
# created on 22 sep.2004, J.M.Sellier
# modified on 09 oct.2004, J.M.Sellier

MATERIAL SILICON
TRANSPORT MC ELECTRONS

FINALTIME 5.5e-12
TIMESTEP 0.0015e-12

XLENGTH 0.6e-6
YLENGTH 0.2e-6

XSPATIALSTEP 96
YSPATIALSTEP 32

# Definition of the doping concentration
# ======================================
DONORDENSITY    0.       0.         0.6e-6    0.2e-6    1.e23
DONORDENSITY    0.       0.15e-6    0.1e-6    0.2e-6    5.e23
DONORDENSITY    0.5e-6   0.15e-6    0.6e-6    0.2e-6    5.e23
ACCEPTORDENSITY 0.       0.         0.6e-6    0.2e-6    1.e20

# Definition of the various contacts
# ==================================
CONTACT DOWN  0.0    0.6e-6 INSULATOR 0.0
CONTACT LEFT  0.0    0.2e-6 INSULATOR 0.0
CONTACT RIGHT 0.0    0.2e-6 INSULATOR 0.0
CONTACT UP    0.1e-6 0.2e-6 INSULATOR 0.0
CONTACT UP    0.4e-6 0.5e-6 INSULATOR 0.0
CONTACT UP    0.0    0.1e-6 OHMIC     0.0 5.e23
CONTACT UP    0.2e-6 0.4e-6 SCHOTTKY -0.8
CONTACT UP    0.5e-6 0.6e-6 OHMIC     1.0 5.e23

NOQUANTUMEFFECTS
MAXIMINI
# SAVEEACHSTEP

LATTICETEMPERATURE 300.

STATISTICALWEIGHT 1500
MEDIA 500

OUTPUTFORMAT GNUPLOT

# end of MESFET test-1

We report in the following pictures (8.1)-(8.5)the results obtained by GNU Archimedes release 0.0.4.

**Figure:** MESFET Density Profile computed by **GNU Archimedes**.
$\begin{figure} \centerline{\psfig{figure=mesfet_pictures/density.ps, width=18cm,height=15cm}} \end{figure}$

**Figure:** MESFET x-component velocity computed by **GNU Archimedes**.
$\begin{figure} \centerline{\psfig{figure=mesfet_pictures/x_velocity.ps, width=18cm,height=15cm}} \end{figure}$

**Figure:** MESFET y-component velocity computed by **GNU Archimedes**.
$\begin{figure} \centerline{\psfig{figure=mesfet_pictures/y_velocity.ps, width=18cm,height=15cm}} \end{figure}$

**Figure:** MESFET Electron Energy computed by **GNU Archimedes**.
$\begin{figure} \centerline{\psfig{figure=mesfet_pictures/energy.ps, width=18cm,height=15cm}} \end{figure}$

**Figure:** MESFET Electrostatic Potential computed by **GNU Archimedes**.
$\begin{figure} \centerline{\psfig{figure=mesfet_pictures/potential.ps, width=18cm,height=15cm}} \end{figure}$

Didier Link 2007-05-18