☀ LIGHT
3D PHOTODIODE SIMULATOR
photodiode models · light source · absorption · photocurrent · band diagrams
LATTICE
ORBITALS
IONIZE
RESPONSE
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SIMULATOR GUIDE
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GETTING STARTED
1
Select a photodiode from the dropdown
2
Drag to orbit, scroll to zoom
3
Use mode tabs to switch physics views
4
Turn on the light source in RESPONSE mode
5
Click and drag the light source directly in 3D
LIGHT SOURCE
1
Switch to RESPONSE mode, click LIGHT ON
2
Set center wavelength and bandwidth (left/right sidebands)
3
Click and drag the light cone directly in 3D to reposition it
4
Photons animate from source to junction, absorb via Beer-Lambert
SHOW CALCULATIONS
1
Click SHOW CALCULATIONS at bottom of sidebar
2
Full derivation: PN junction, absorption, photocurrent, C, tau
3
REPLAY TAU animates step response I(t)
Legend
i
Si atom
Donor P
Acceptor B
Bond
Valence e-
Free e-
Photon
Photo e-
Photo h+
Photodiode Model
i
CWDM4 Lane
L0
L1
L2
L3
L0: 1271 nm | BW 13 nm | 1264.5–1277.5 nm
Legend
i
Si atom
Donor P
Acceptor B
Bond
Valence e-
Free e-
Photon
Photo e-
Photo h+
Lattice Type
Doping Level
LIGHT
MED
HEAVY
Junction Profile
ABRUPT
LINEAR
GAUSS
Light Source
LIGHT ON
MOVE LIGHT
WHITE
Center lambda
WHITE
Left sideband
380 nm
Right sideband
700 nm
BW: 320 nm (white)
Power
1.0
Distance
5 cm
x: 3.6 y: 8.0 z: 0.0
alpha: -- | delta: -- | E_ph: --
Controls
Load R
1 kΩ
R_LOAD ON
Lattice size
3x3x6
Atom radius
1.0
Speed
1.0x
BONDS
ORBITALS
LABELS
FREE e-
RESET
PAUSE
SPIN
LOG
LEGEND
Select a photodiode model above
Live Stats
Free e-
0
Holes h+
0
Ionized donors
0
Ionized accept.
0
Photons absorbed
0
Photons reflected
0
I_ph
--
QE eta
--
R (A/W)
--
Mode
LATTICE
I-V Characteristic
Spectral Responsivity
Quantum Efficiency
Capacitance & Response
C_j
-- pF
tau
-- ps
f_3dB
-- GHz
REPLAY TAU
SHOW CALCULATIONS
VOLTAGE (V) vs TIME
CURRENT (I) vs TIME
FULL CALCULATIONS
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