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 20 of 21 for “"infrared detector"”.
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Micromachined infrared detector using wafer bonding technology
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1996.
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Absolute Calibration of an Infrared Detector to Monitor Oxygen Singlet Delta Concentrations Using the No-O Glow as a Chemiluminescent Standard
Made available in DSpace on 2017-07-06T18:56:20Z (GMT). No. of bitstreams: 2 Shannon_David_C_MS.pdf: 37340707 bytes, checksum: f7f2ecdf2d7730d09bfbdf23d71ef940 (MD5) license.txt: 4813 bytes, checksum: 715c4321821a960fa1a1e91d2ac7ebce (MD5) Previous issue date: 1984
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Design, development and characterization of an integrated multispectral polarimetric sensor system
… multispectral and polarimetric signatures in an infrared scene. The sensor is a stack consisting of an infrared detector array, and an array of multispectral and polarimetric filters. In this first phase of the research, a single-pixel sensor was built. Multispectral filters were initially …
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Mems approaches in infrared imaging
… novel Microelectromechanical System (MEMS) based infrared detector, that utilizes coefficient of thermal expansion, is discussed. The detector design uses a variety of thermal expansion coefficient materials, including alloys which are connected to ambient through a thermal conducting bridge. The …
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Experimental evaluation and modeling of a turbine blade with potassium evaporative cooling
… at the Massachusetts Institute of Technology. An infrared detector capable of high scan rates was used to fully map the temperature distribution of a single, heated, rotating turbine blade. The blade surface temperature maps show that the Return Flow Cascade works as designed by enforcing a nearly …
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Handheld infrared camera use for suicide bomb detection: feasibility of use for thermal model comparison
… from long distances, and safe for the both detector and the object being detected. One detector that has shown potential as a tool for detecting hidden weapons is an infrared detector. Infrared detectors are passive sensors that create infrared, or thermal, images without having to expose …
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Synthetic and analytical investigations related to vegetable oils and fats.
… A new application is reported in the use of the infrared detector in HPLC for the detection and preparative and quantitative separation of triacylglycerols of seed fats and oils, acylglycerols from lipolysis mixtures and synthetic acylglycerols. The composition of the total triacylglycerol of …
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Mapping the thermal conductivity of SiC/SiC composites
… the in-plane thermal conductivity of a MEMS infrared detector device.
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Multispectral Metamaterial Detectors for Smart Imaging
<p>The ability to produce a high quality infrared image has significantly improved since its initial development in the 1950s. The first generation consisted of a single pixel that required a two-dimensional raster scan to produce an image. The second generation comprised of a linear array of …
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Probing Power-Absorbing Structures at Near-Infrared Wavelengths using Energy Absorption Interferometry
… mode power-absorbing structures, such as near-infrared detectors. A detector’s output can be written as the full spatial contraction of the external field correlation tensor and detector response correlation tensor representing their respective spatial coherence states; EAI recovers the latter, …
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Science and applications of infrared semiconductor nanocrystals
… of semiconductor nanocrystals (NCs) with infrared band gaps. In the first half, we explore the physics of two systems with applications in NC based photovoltaics. The physics of mixed films of CdTe and CdSe NCs is studied in chapter 2 as a model for NC based bulk heterojunction …
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Scalable 3D carbon nanotube structures for bolometric infrared sensor arrays
The infrared detector market has experienced steady growth over the last 10 years and is expected to reach hundreds of million dollars by 2025. The demand for more accurate, lower cost, and lower power consumption IR sensors is driven by emerging applications such as autonomous vehicles. Uncooled …
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Growth and characterization of high quality relaxed graded silicon germanium layers for integrated photodetectors
… and prove the feasibility of a high quality infrared detector on a Si substrate. The dark current in the diodes was at least two orders of magnitude lower than any previously reported value for Ge photodiodes on Si substrates. Capacitance measurements indicate that the devices are capable of …
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Aluminum nitride microelectromechanical infrared detectors with integrated metamaterial absorbers
… development of uncooled spectrally selective mid-infrared (IR) detectors based on the seamless integration of metamaterial (MM) structures with microelectromechanical (MEMS) AlN resonators. Historically, uncooled absorbers have been limited in two key metrics: selectivity, the ability to …
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Investigation of InAs/GaSb superlattice based nBn detectors and focal plane arrays
Infrared (IR) detectors are used for a variety of imaging applications, such as terrestrial surveillance, biomedical diagnostics, and target acquisition. Presently, the most common photon detectors for these applications are based on interband transitions in pn junctions made of mercury cadmium …
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Ultra-sensitive Mid-infrared Detection Using Phononic Crystal Resonator-based Oscillator
Mid-infrared (MIR) detection is essential for many applications such as chemical sensing, communications, space explorations, and national defense. Existing MIR detectors are typically categorized into two major classes: (1) semiconductor photodetectors, which offer high responsivity and fast …
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Plasmon supported defect absorption in amorphous silicon thin film solar cells and devices
… However, the effect can be of interest for near infrared detector applications. Especially due to the enormous enhancement factors that are possible with these systems. Depending on the used photosensitive device structure, enhancement factors between 40 and 200-500 are achieved. The …
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Development of microcantilever mid-infrared detectors and sources and their application in infrared spectroscopy
Mid-infrared (mid-IR) light is an electromagnetic radiation with the wavelengths of 3 – 30 um. This spectral range includes the dominant wavelengths of the thermal radiation emitted by objects at or near room temperature, and vibrational and rotational resonance frequencies of many molecules. The …
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Antimony-based type-II superlattice infrared detectors
… 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 III-V …
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Vanadium Oxide Microbolometers with Patterned Gold Black or Plasmonic Resonant Absorbers
… to meet the needs of the next generation of infrared detectors, which seek low power consumption and production cost without sacrificing performance. Presented here is the design, fabrication, and characterization of a microbolometer with responsivity enhanced by novel highly absorptive …
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