I have attached my input file for deckbuild and current structure. As well as intended structure.

code for structure:

go atlas

TITLE device simulation

mesh space.mult=1.0

x.mesh loc=0 spac=0.25

x.mesh loc=0.4 spac=0.25

#n-InAs(0.1um)

y.mesh loc=0 spac=0.05

y.mesh loc=0.1 spac=0.05

#substrate n+InAs(0.3um)

y.mesh loc=0.4 spac=10

#n-InAs

region num=1 material=InAs x.min=0 x.max=0.4 y.min=0 y.max=0.1

region num=2 material=InAs x.min=0 x.max=0.4 y.min=0.1 y.max=0.4

elec num=1 material=titanium name=anode top

elec num=2 material=titanium name=cathode bottom

doping uniform region=1 n.type conc=1e18

doping uniform region=2 n.type conc=1e19

material taup0=2e-6 taun0=2e-6

#COPT=1.1e-10 AUGN=8.3e-32 AUGP=1.8e-31

material material=InAs EG300=0.35 PERMITTIVITY=14.6 AFFINITY=4.54

material material=InAs NC300=9.2e16 NV300=7.1e18

material material=InAs mup=450 mun=33000

#material material=titanium imag.index=1000 real.index=3.16228

models srh auger conmob fldmob

solve init outf=photodetector.str master

tonyplot photodetector.str

beam num=1 x.origin=0.2 y.origin=-0.1 angle=90.0 wavelength=1

method newton trap maxtrap=10 itlimit=100

solve init

contact name= anode voltage

solve vanode=0.1

#getspectralresponse

log outf=photodetector.log master

solve prev b1=1 lambda=1

solve prev b1=1 lambda=1.1

solve prev b1=1 lambda=1.2

solve prev b1=1 lambda=1.3

solve prev b1=1 lambda=1.4

solve prev b1=1 lambda=1.5

solve prev b1=1 lambda=1.6

solve prev b1=1 lambda=1.7

solve prev b1=1 lambda=1.8

solve prev b1=1 lambda=1.9

solve prev b1=1 lambda=2.0

solve prev b1=1 lambda=2.1

solve prev b1=1 lambda=2.2

solve prev b1=1 lambda=2.3

solve prev b1=1 lambda=2.4

solve prev b1=1 lambda=2.5

solve prev b1=1 lambda=2.6

solve prev b1=1 lambda=2.7

solve prev b1=1 lambda=2.8

solve prev b1=1 lambda=2.9

solve prev b1=1 lambda=3.0

solve prev b1=1 lambda=3.1

solve prev b1=1 lambda=3.2

solve prev b1=1 lambda=3.3

solve prev b1=1 lambda=3.4

solve prev b1=1 lambda=3.5

solve prev b1=1 lambda=3.6

solve prev b1=1 lambda=3.7

solve prev b1=1 lambda=3.8

solve prev b1=1 lambda=3.9

solve prev b1=1 lambda=4.0

solve prev b1=1 lambda=4.1

tonyplot photodetector.log

quit

This what i tried to do but i am not sure if it's correct:

elec num=1 material=titanium name=anode right length=0.1

elec num=2 material=titanium name=cathode bottom

elec num=3 material=titanium name=anode left lenth=0.1