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 “"HgCdTe"”.
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Thermal annealing effects on boron-implanted HgCdTe diodes
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1988.
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Effects of static axial magnetic fields on directional solidification of HgCdTe
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1997.
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Advanced numerical modeling and characterization of infrared focal plane arrays
Mercury cadmium telluride (HgCdTe) is the detector material of choice for high performance infrared (IR) focal plane arrays (FPAs). Unique among semiconductor materials, HgCdTe features a widely tunable, direct bandgap from the ultraviolet to very long wavelength IR, lattice matched substrates, …
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Studies of sputtered CdTe and CdSe solar cells
… 5) In addition, for the bottom cell I fabricated HgCdTe cells with Eg~1.1 eV.Single junction HgCdTe and two-terminal CdTe/HgCdTe tandem solar cells werefabricated and characterized. (Chapter 5)
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Exploration of 3D Nanoscale Image Sensor to Enable Logic and Sensing in Single Chip
… is shown. We have explored new Horizontal HgCdTe junction less Nanowire transistor based Image sensor. If we can realize this kind of new 3D image sensor device then they can be integrated seamlessly in 3D image sensor circuitry. Simulation of fabrication steps for HgCdTe based Nanowire …
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Measurement of 'one over f noise' in infrared detection using a novel technique
… the sensitivity in Mercury Cadmium Telluride (HgCdTe) infrared devices. It is therefore imperative to be able to measure and account for its contribution to the total device noise. In this thesis, the 1/f noise of a HgCdTe device is measured and studied using two measurement techniques. The …
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Post-growth spectral tuning of InGaAs/GaAs quantum dot infrared photodetectors
… heat-seeking missiles incorporate two-colour HgCdTe arrays to discern target aircraft from decoy flares. Hyperspectral imaging describes the fusion of imaging and spectroscopy. These systems exhibit high spatial and spectral resolution, generally by dispersing different wavelengths onto a …
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Post-growth spectral tuning of InGaAs/GaAs quantum dot infrared photodetectors
… heat-seeking missiles incorporate two-colour HgCdTe arrays to discern target aircraft from decoy flares. Hyperspectral imaging describes the fusion of imaging and spectroscopy. These systems exhibit high spatial and spectral resolution, generally by dispersing different wavelengths onto a …
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Mid-Wave and Long-Wave Single Uni-polar Barrier Infrared Detectors Based on Antimonide Material Systems
… current behavior to be within a factor of 2 of HgCdTe based detectors. The more basic of these designs, the nBn, has been utilized in InAs detectors, InAsSb detectors, HgCdTe detectors, and both mid and long-wave superlattice detectors with success. However, questions and optimization remain …
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Growth of CdTe/ CdZnTe single crystals by the vertical gradient freezing method
… used as substrates for the epitaxial growth of HgCdTe, which is a key material for far-infrared detectors with high resolution and large detection area. Currently, there are no mature techniques to grow CdTe/CdZnTe single crystals, and the cost of these materials for commercial purposes is still …
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Theory and experiments of type-II superlattice infrared photodetectors
… performance of those based on the commercialized HgCdTe II-VI system. An electronic band structure model is formulated based on the 8-band k · p method. The absorption and quantum efficiency spectra are calculated, showing good agreement with experimental data. The interfacial effect in type-II …
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Integrated Heteroepitaxial Photodetectors
… set, Hg₁₋ₓCdₓTe. Extensive research pushed HgCdTe to nearly reach its theoretical performance limit, while also highlighting its inherent shortcomings for commercialization. An upcoming material set, [formula] has the potential to overcome such barriers while promising comparable …
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Defect investigations in InAs/GaSb type-II strained layer superlattice
… 3-30 um. Compared to competing materials such as HgCdTe and InSb, InAs/GaSb superlattices are more mechanically robust, have reduced tunneling currents, and can use strain to suppress Auger recombination. In spite of these advantages, this material still faces several challenges, including low …
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Propellant Surface Temperature and Plume Characteristics of Micro-Pulsed Plasma Thrusters
… detector material is Mercury Cadmium Telluride (HgCdTe), chosen because the maximum detector response occurs in wavelengths where a Carbon-Fluorine stretching mode in the solid propellant emits strongly in the infrared. This paper outlines the design, calibration and construction of the infrared …
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Optimised ground-based near-infrared instrumentation for robotic exoplanet transit surveys
… lower-cost alternative to the traditionally used HgCdTe based instrumentation, as well as being better suited to robotic observatories. On sky results of SPIRIT at SSO successfully demonstrated better photometric precision for stars below 2550 K than the existing instrumentation. It similarly …
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Simulations and technology development for time-domain astronomy : TESS and InGaAs detectors
… are a less-expensive alternative to the HgCdTe detectors in current use, enabling wide-area IR surveys and IR observations with small telescopes to take place. Using camera hardware that I designed and constructed, I have tested InGaAs detectors as they have matured into an appropriate …
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Nanostructures for Coherent Light Sources and Photodetectors
… detectors, narrow bandgap materials (InGaAs, HgCdTe) semiconductors, photo-ionization of shallow impurities in semiconductors (Si:As, Ge:Ga), and quantum well structures. Such technology requires complicated fabrication processes or cryogenic operation, resulting in manufacturing costs and …
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Characterization of, and novel architectures for, strained-layer superlattice infrared photodetectors
… 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 due to several potential and predicted advantages over MCT. T2SLs offer an easier path to the …
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Investigation of Infrared Detectors Based on the Gallium-free Superlattice
… The current industry standard material is HgCdTe, which has been developing since its inception in the late 1950s. SLS materials are created from very thin layers, on the order of several to several tens of atomic monolayers, of two different bulk materials. These layers are alternated …
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