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Showing 1 to 11 of 11 for “"QWIP"”.
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Design of quantum well infrared photodetectors
QWIPs which respond to normally incident radiation without the need for an optical grating are of particular interest because they can be fabricated with fewer process steps and increased expected yield. An important contribution of this work is the demonstration of the first n-type QWIP (n-QWIP) …
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Bispektrale Detektion und optische Nichtlinearitäten in Quantentopf-Infrarot-Photodetektoren
Quantentopf-Infrarot-Photodetektoren (QWIPs) erlauben die Herstellung von Infrarot-Kameras mit thermischen Auflösungen im Bereich weniger mK. Ihre Funktionsweise basiert auf optischen Übergängen zwischen quantisierten Niveaus eines zweidimensionalen Elektronengases, welches in …
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Material processing of quantum well infrared photodetectors
… quantum well (MQW) infrared (IR) photodetectors (QWIPs) epitaxially grown on GaAs and Si substrates is presented. The advances in epitaxial growth allow the precise control of the dimensions, doping, and matrix concentration of the MQW. Therefore, the design of a QWIP with particular electrical …
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Combinatorial Pulsed Laser Deposition Employing Radially-Segmented Targets: Exploring Orthorhombic (InxGa1−x)2O3 and (AlxGa1−x)2O3 Towards Superlattice Heterostructures
… Quantengrabeninfrarotphotodetektoren (QWIPs). Im ersten Teil wird die Methode, welche vertical continuous composition spread (VCCS) PLD genannt wird, eingeführt und am MgxZn1−xO Legierungssystem erprobt. Die Methode erlaubt die Kontrolle der Komposition von Dünnfilmen über die radiale …
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Desarrollo de detectores de infrarrojo fotovoltaicos, de pozo cuántico y doble barrera, para la banda de 3-5 um
… de detectores de infrarrojo de pozo cuántico (QWIP) con operación fotovoltaica (PV) en la ventana de transmisión atmosférica de 3-5 µm. El mecanismo de operación de un QWIP reside en las transiciones intersubbanda que se establecen entre las subbandas energéticas de un pozo cuántico de …
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Multispectral Metamaterial Detectors for Smart Imaging
… both a quantum well infrared photodetector (QWIP) and interband cascade detector (ICD) hybridized with a metamaterial absorber for enhanced multicolor sensitivity in the infrared regime. Through this work, along with some design lessons throughout this iterative process, we design, fabricate …
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Quantentopf-Infrarot-Photodetektoren für Hochgeschwindigkeitsanwendungen und Thermographie
Quantentopf-Infrarot-Photodetektoren für Hochgeschwindigkeitsanwendungen und Thermographie
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Investigation of InAs/GaSb superlattice based nBn detectors and focal plane arrays
… transistions in quantum well infrared detector(QWIP). However, lack of spatial uniformity over larger area and difficulties with the material growth plagues MCT detectors. The quantum efficiency of QWIPs is low and they cannot couple normal incidence photons due to absorption selection rules. …
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Growth and optimization of quantum dots-in-a-well infrared photodetectors
… that of Quantum Well Infrared Photodetector (QWIP). In this work, we will investigate various methods we implemented in improving the performance of the DWELL photodetectors. Although QDIPs based on intersubband transitions have been investigated before, there has been no careful study on the …
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Longwave and bi-color type-II InAs/(In)GaSb superlattice infrared detectors
… well or quantum dot infrared photodetectors (QWIPs or QDIPs). These detectors operate at low temperatures (77 K-200 K) in order to obtain high signal to noise ratio. The cooling requirement limits the lifetime, increases the weight and the total cost, as well as the power budget, of the whole …
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Spectral Signature Modification By Application Of Infrared Frequency-selective Surfaces
It is desirable to modify the spectral signature of a surface, particularly in the infrared (IR) region of the electromagnetic spectrum. To alter the surface signature in the IR, two methods are investigated: thin film application and antenna array application. The former approach is a common and …