A photoconductor is a device whose resistance and conductivity changes in the presence of light. Most modern photodetectors operate on the basis of the internal photoelectric effect, where the photoexcited electrons and holes remain within the material, increasing the electrical conductivity of the material which use for Terahertz communication and other applications.
Construct an Atlas model for a mesa UTC photodetector and please find :
I-V curve (reverse, forward biased) without light
PD impulse response when biased at -3 volt. To mitigate nonlinear effect, use small optical input
Frequency response of the PD
The x, y composition for lattice matched 1.1Q and 1.4Q
(By applying the equations for the InGaAsP bandgap in MATLAB)
IV - Curves : forward and Reverse
Frequency and Impulse Response
Structure (Biased)
MQW Structure
Cutline Biased
MQW Cutline
