- 學位論文
量子井紅外線偵測器之模型建立與模擬
Modeling and Simulation of Quantum Well Infrared Photodetector
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摘要
量子井紅外線偵測器(QWIP)在最近幾年快速發展，因為其靈敏度高、穩定、性能均勻一致且良好。除此之外QWIP也可以製作大面積、低功耗、低成本、高均勻性和高靈敏度的焦平面陣列(FPA)，使其應用範圍廣泛。為了要研究其工作機制和原理，必須了解內部參數與元件外部特性關係，但是內部參數很難直接測量，所以透過計算機分析與模擬量子結構元件模型是較好的方法。 本研究會針對半導體GaAs/AlGaAs超晶格材料所構成的量子井紅外線偵測器，將其電學性能與光耦合性能進行研究與分析。然後利用MATLAB數值分析方式來模擬量子結構理論，並且建立GUI介面與SPICE兼容模型以提供給前端或後端設計者使用。由模擬結果來分析不同量子結構理論與實際差異，可藉此加速開元件發過程，此外利用HSPICE將SPICE兼容模型與讀出電路(ROIC)進行系統層級模擬，來驗證結果符合預期。
並列摘要
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.
參考文獻
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