COVER
Notations
Table Captions
Figure Captions
Chapter 1 Introduction
1.1 Overview of Quantum Well Infrared Photodetector
1.2 Outline of the Thesis
Chapter 2 Basic Theory of Quantum Well Infrared Photodetectors
2.1 Introduction
2.2 Absorption
2.3 Quantum Efficiency
2.4 Optical Gain
2.5 Responivity
2.6 Dark Current
2.7 Noise
2.8 Detectivity
2.9 Summary
Chapter 3 Experimental Techniques
3.1 Molecular Beam Epitaxy Growth
3.2 Device Processing
3.3 Measurements
3.4 Summary
Chapter 4 Influence of Material Quality on the GaAs/AlGaAs Quantum Well Infrared Photodetectors
4.1 Introduction
4.2 Specimen Preparation and Examination
4.3 The Performance of QWIPs Limited by Oxygen
4.4 Summary
Chapter 5 The Effect of Tunnel Barrier Thickness on the Performance of Double Barrier Quantum Well Infrared Photodetectors
5.1 Introduction
5.2 Design of the Tunnel Barriers
5.3 Optimum Thickness of the DBQWIPs
5.4 Summary
Chapter 6 Two-Color Quantum Well Infrared Photodetectors
6.1 Introduction
6.2 Two-Color QWIPs with Peak Sensitivities at 5.3 and 8 μm
6.2.1 Decive Structure
6.2.2 Absorption of the Two-Color QWIPs
6.2.3 Mechanism of the Two-Color QWIPs
6.3 Two-Color QWIP with Peak Sensitivities at 3.9 and 8.1 μm
6.3.1 Decive Structure
6.3.2 Absorption of the Two-Color QWIPs
6.4 Comment on the Two QWIPs
6.5 Summary
Chapter 7 Enhancement of 2D Grating Couplers on the Performance of Quantum Well Infrared Photodetectors
7.1 Introduction
7.2 Device Structure and Examination
7.3 Two Dimensional Gratings coupled on One-Color QWIPs
7.3.1 Spectral Responses of QWIPs
7.3.2 Polarization Analysis
7.4 Two Dimensional Gratings coupled on Two-Color QWIPs
7.4.1 Spectral Responses of QWIPs
7.4.2 Polarization Analysis
7.5 Summary
Chapter 8 Asymmetric Dark Current in Quantum Well Infrared Photodetectors
8.1 Introduction
8.2 Basic Assumption and Theoretical Calculation
8.3 Experimental Conditions
8.4 I-V Curves
8.5 Summary
Chapter 9 128 X 128 Focal Plane Array
9.1 Introduction
9.2 Mask Design
9.3 Process
9.4 Summary
CONCLUTION
vita
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