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 15 of 15 for “"Long-wavelength infrared"”.
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Iii-V Multiple Quantum Well Long-Wavelength Infrared Detectors
… to the future sensitive, low-cost, large long wavelength infrared focal-plane arrays.
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Long wavelength infrared detectors utilizing multiple quantum wells in III-V compound semiconductors
Data are presented on various infrared detectors based on multiple GaAs/AlGaAs quantum wells. Due to the great flexibility in the growth, dimensions, and composition of these structures, the electrical and optical characteristics of the photodetector may be significantly altered. This investigation …
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Study of quantum dot and quantum well photodetectors
A study of quantum dots-in-well infrared photodetectors (QDIPs) yields results useful for the creation of a two-colour QDIP. Quantum dot infrared photodetectors (QDIPs) have been shown to be a key technology in mid and long wavelength infrared detection due to their potential for normal incidence …
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Development of antenna-coupled metal-insulator-metal diodes for infrared detection
The long-wavelength infrared (LWIR) band between 7 and 14 µm is significant for thermal imaging purposes because it coincides with the blackbody radiation peak of the human body and a low absorption window in the earth’s atmosphere. Also, at 10 µm wavelength, the earth’s terrestrial radiation is …
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Antimony-based type-II superlattice infrared detectors
Numerous applications within the mid- and long-wavelength infrared are driving the search for efficient and cost effective detection technologies in this regime. Theoretical calculations have predicted high performance for InAs/GaSb type-II superlattice structures, which rely on mature growth of …
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Post-growth spectral tuning of InGaAs/GaAs quantum dot infrared photodetectors
Infrared photodetectors are essential in many industries and modern applications require devices with enhanced capabilities. High-performance detectors can be used for spectroscopy in medicine and environmental monitoring. Imaging scenarios include the identification of military targets and …
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Post-growth spectral tuning of InGaAs/GaAs quantum dot infrared photodetectors
Infrared photodetectors are essential in many industries and modern applications require devices with enhanced capabilities. High-performance detectors can be used for spectroscopy in medicine and environmental monitoring. Imaging scenarios include the identification of military targets and …
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Algorithms for multi-modal human movement and behaviour monitoring
… of automated people tracking using multi-modal infrared (IR) and visible image information. The research question posed is; “To what extent can infrared image information be used to improve visible light based human tracking systems?” Automated passive tracking of human subjects is an active …
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Multi-spectral System for Autonomous Robotic Location of Fires Indoors
… The multi-spectral sensor platform used a long wavelength infrared (LWIR) camera and ultraviolet (UV) sensor. The LWIR camera was chosen for its ability to see through smoke, while the UV sensor was selected for its ability to discriminate between fires and non-fire hot objects. The fire …
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Defect characterization of antimonide-based type-II superlattices for infrared detection
… proposed use for the detection of mid- to long-wavelength infrared (MWIR, LWIR) radiation. The type-II broken band gap alignment of these heterostructures allows electrons and holes to be confined in separate but adjacent, nanometer scale thickness, material layers. When arranged in a …
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Electronic systems for interfacing with new materials and devices
… In particular, graphene is explored as a new infrared sensitive material that can be used for sensors in mid- and long-wavelength infrared spectrum ([lambda] = 2- 15[mu]m) imaging systems. We demonstrate a Si CMOS-based readout IC and monolithic integration of an array of > 4000 electronically …
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New materials with potential for optical device applications: The synthesis and characterization of new mixed-metal quaternary sulfides and selenides
… for compounds that are candidates for use as long-wavelength (8-12 $\mu$m) infrared window materials. At the present time there is a deficiency of suitable materials which are appropriate for use in the long-wavelength infrared region. This is because there is an inherent conflict (the …
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Rangefinding in Fire Smoke Environments
… commercial rangefinders and cameras as well as a long-wavelength infrared (LWIR) stereo vision system developed in this research. The smoke was varied from dense, low temperature smoke to light, high temperature smoke for evaluation in a range of conditions. Through small-scale experiments on …
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Characterization of, and novel architectures for, strained-layer superlattice infrared photodetectors
The current generation of infrared photodetectors, used in imaging and sensing applications, are predominantly made of an expensive II-VI material, HgCdTe (mercury cadmium telluride, MCT). A viable alternative class of materials, the III-V type-II superlattices (T2SLs), have been actively studied …
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Fabrication and Characterization of Optoelectronics Devices Based on III-V Materials for Infrared Applications by Molecular Beam Epitaxy
… devices based on III-V materials operating in infrared wavelength range have been attracting intensive research effort due to their applications in optical communication, remote sensing, spectroscopy, and environmental monitoring. The novel semiconductor lasers and photodetectors structures and …