For one contact separation plot the total current vectors flowing through the GaAs layer. Is the transfer length you determined in (3) consistent with the current vector flow? Explain your answer.

# (c) Silvaco Inc., go athena

# GaAs TLM Structure # Define the mesh

line x loc=-2.2 spac=0.1 line x loc=-.7 spac=0.05 line x loc=-.5 spac=0.05 line x loc=0.0 spac=0.05 line x loc=0.5 spac=0.05 line x loc=0.7 spac=0.05 line x loc=2.2 spac=0.1 # line y loc=0.00 spac=0.01 line y loc=1.00 spac=0.2 # # Define the p-type GaAs substrate init gaas c.beryllium=1.0e13 orient=100 space.mult=1

# Define implant and anneal for n-type channel implant silicon energy=50 dose=10e12

diffus time=10 temp=850

# deposit contact metal deposit aluminum thick=.2 divisions=4

etch aluminum start x=-0.2 y=10 etch cont x=-0.2 y=-10 etch cont x=0.2 y=-10 etch done x=0.2 y=10 # electrode name=source x=-1.0 electrode name=drain x=1.0

go atlas

# specify lifetimes in GaAs and models material material=GaAS taun0=1.e-8 taup0=1.e-8 models conmob fldmob srh optr print

# Begin solution method newton trap solve vdrain=0.02

# Ramp drain voltage and log results log outf=TLM_400nm.log master solve vdrain=-0.05 vstep=0.002 vfinal=0.05 name=drain

save outfile=TLM_400nm.str

# Define electrical characteristics saved in output log file output j.total ex.field jx.total ey.field jy.total flowlines e.mobility h.mobility e.temp h.temp con.band qfn j.disp photogen impact save outf=current_vectors

tonyplot TLM_400nm.log

tonyplot TLM_400nm.str

quit