Modeling and Simulation of Quantum Well Infrared Photodetector
Date Issued
2015
Date
2015
Author(s)
Lin, Ding-Jyun
Abstract
The quantum-well infrared photodetectors (QWIPs) have become research focus in recent years due to its many inherent properties, such as highly sensitive, stability, higher fabrication uniformity, and better production yield. In addition, QWIPs can be fabricated into an imaging system with a large area, low power, low cost by using a high-sensitivity focal plane array (FPA). In order to study the basic processes of a quantum structure devices, we must know the relations between the external physical properties and the internal parameters. However, the measurement of internal parameters is very difficult. Therefore using computer simulation and device modeling is a better way to analyze quantum structure devices. In this Thesis, the electronics performance and the optical performance of a QWIP fabricated with GaAs/AlGaAs superlattice material are discussed. And the characteristics of this QWIP is theoretically analyzed and studied by numerical simulation with MATLAB. A Graphical User Interface (GUI) and SPICE-compatible model are then built for front-end and back-end designers to use. Besides, QWIPs with different quantum structures are compared and theoretically analyzed by simulation. Therefore, we can accelerate the device development process. In addition, the SPICE-compatible model is used in the system-level simulation of QWIP and readout integrated circuit (ROIC) in HSPICE, which results are very close to the expected results.
Subjects
Quantum Well Infrared Photodetector
Superlattice
Dark Current
SPICE Modeling
Type
thesis