Post on 19-Dec-2015
Outline
• Introduction• Comparison of Photodetectors• Photon detection• Device Simulation • Optoelectronic Device Simulator• Results
2
Introduction
• The poster presents simulation of recombination rate and quantum efficiency of an photodetector (photodiode) being fabricated at RIDL.
• Simulated total integrated recombination rate significantly contributes to the reverse diode leakage current.
• Quantum efficiency is defined as the ratio of the number of carriers detected at a given photodetector electrode divided by the number of incident photons on the detector.
3
Comparison of Photodetectors
Generic Operating Parameters of Si, Ge, and GaAs pin Photodiodes
[Source: Optical Communications Essentials, Gerd Keiser, pp 113.]4
Photon Detection• pinpin photodiode operated in reverse bias
– pp+ – high acceptor concentration
– iintrinsic (lightly) doped material
– nn+ –high donor concentration
• I-VI-V characteristics of pin photodiode:– (1) with no light– (2) with light
5
Luminous is an advanced simulator used to model absorption and photogeneration in semiconductor devices
7
Optoelectronic Device Simulator
Silvaco Athena simulation tool Silvaco Athena simulation tool
Process simulation uses Athena &
Electrical simulation uses Atlas, Luminous
Graphs are generated using Tonyplot