Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 5 of 5 for “"Intersubband transition"”.
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Design, fabrication and characterization of terahertz quantum-well photodetectors
… (FPA). In this thesis project, the theory of the intersubband transition and carrier transport in a THz QWP is studied. The designe, fabrication, measurement-system buildup, and characterization are performed. In addition, the design and fabrication process of THz QWP-LED are also carried out. …
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MULTICOLOR INFRARED DETECTION USING STEP QUANTUM WELLS
… well infrared photodetectors (QWIPs) based on intersubband transitions are widely investigated in recent years. Due to the mature III-V material and processing technology, great progress has been made successfully for the fabrication of large scale quantum well infrared focal plane arrays …
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Engineered quantum dots for infrared photodetectors
… (LWIR) regime. These detectors are based on intersubband transitions in self-assembled InAs quantum dots (QDs) and offer several advantages such as normal incidence detection, low dark currents and high operating temperatures, while enjoying all the benefits of a mature GaAs fabrication …
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The transistor-injected quantum cascade laser
… semiconductor laser that utilizes electron transitions between quantized states in the conduction band for optical emission. Due to the unipolar nature of the device, the quantum cascade laser cannot deliver spectrally stable output under different levels of current injection, which limits …
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Θεωρητική μελέτη μη-γραμμικών οπτικών διαδικασιών σε ημιαγώγιμα κβαντικά πηγάδια
Στην εργασία αυτή, μελετάμε, τόσο με αναλυτικό όσο και με υπολογιστικό τρόπο, γραμμικά και μη γραμμικά οπτικά φαινόμενα σε συστήματα ημιαγώγιμων κβαντικών πηγαδιών GaAs/AlGaAs δύο ενεργειακών υποζωνών, όπου επάγονται διαϋποζωνικές μεταβάσεις, υπό την επίδραση ηλεκτρομαγνητικών πεδίων. Στο πρώτο …