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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 91 for “"Cathodoluminescence"”.
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Steady State and Time-Resolved Cathodoluminescence Analysis of III-Nitride Semiconductors
Cathodoluminescence is a tool that is used to investigate optical emission from semiconductors. The technique operates by exciting the sample with a focused electron beam such that it becomes excited and emits photons which are then analysed. The technique can be operated with a continuous electron …
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Applications of Cathodoluminescence in Plasmonic Nanostructures and Ultrathin InAs Quantum Layers
… quantum layers, are investigated by the cathodoluminescence (CL) measurement. </p> <p>Surface plasmonic resonance can be generated when high-energy electrons strike the interface between the dielectric medium and plasmonic nanomaterials. It is found in our research that a special …
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Photoluminescence and cathodoluminescence of undoped and cerium doped YAG single crystals
Thesis (Elec.E)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1982.
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Cathodoluminescence of radiation damage, non-stoichiometric and impurity defects in cadmium telluride
… impurity doping on the liquid helium temperature cathodoluminescence of cadmium telluride have been investigated. Under such treatment the responses of the emissions have cast some doubt on the previously accepted significance of the simple cadmium vacancy acceptor in the edge emission spectrum of …
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Probing interfacial electronic structure in quantum materials using stem cathodoluminescence spectral imaging
… transmission electron microscopy (STEM) with cathodoluminescence (CL) detection for the structure and optical property measurements. The STEM/CL instrumentation is coupled to a spectrometer in a time-resolved measurement system for hyperspectral mapping in position and optical energy, as well …
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An electron microprobe study of luminescence centers in cassiterite
… luminescence centers. The relative intensity of cathodoluminescence and the amount and kind of impurity activators were simultaneously measured while scanning the growth zones with a micro-focussed electron beam. Two distinct emission bands were observed, a yellow-green (λ ~ 565 mµ) band for …
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Electron Injection-induced Effects In Iii-nitrides: Physics And Applications
… combination of electron beam induced current and cathodoluminescence measurements was used to understand the impact of electron injection on the minority carrier transport and optical properties. In addition, the application of the electron injection effect in optoelectronic devices was …
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A study of unusual diamonds from the George Creek K1 Kimberlite dyke, Colorado
Cathodoluminescence photomicrographs of diamonds from the George Creek Kl (section 28) kimberlite dyke in Colorado reveal complex intergrowth relationships between CO?-free and CO?-bearing diamond growth generations. The distribution of the CO?-bearing diamond in some specimens suggests that this …
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Isotopic - Textural - Chemical Studies of Mid-Cretaceous Limestones: Implications for Carbonate Diagenesis and Paleooceanography
… of each component was determined by means of cathodoluminescence, light microscopy, and scanning electron microscopy, along with inferences from isotopic and chemical results.
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Petrology of Mineralized and Non-Mineralized Samples from the Railroad District within the Carlin Trend, Elko, NV
… Scanning ElectronMicroscope (ESEM), and cathodoluminescence to identify the relationship betweenhost rock and gold mineralization fluids. The Railroad District, southwest of Elko,Nevada, is part of the Carlin Trend, an area known from submicroscopic gold deposition.Samples consisted of …
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Development of Nanostructured Light Emitters in Gallium Nitride
… using electron microscopy and in-situ cathodoluminescence, resolving structural features that correlate with cathodoluminescence images, and providing insight into the differences between QD samples grown by quasi-two-temperature and modified droplet epitaxy methods. Refractive index …
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Calcite cements in carbonates of the Sverdrup Basin, Canadian Arctic Archipelago.
… micro-scale, petrography with light microscopy, cathodoluminescence (CL), scanning electron microscopy (SEM) and staining helped to identify two main textural groups of cements, neomorphic and primary. Both are, in turn, subdivided into two categories: calcitized aragonite and recrystallized …
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Diagenesis of the B chalk, B marl, and Fort Hays member of the Niobrara Formation, Denver Basin, Colorado
… burial depth and increasing temperatures. Cathodoluminescence petrography, scanning electron microscopy, geothermal data, and stable oxygen isotopes provided insight into the varying diagenetic changes that have occurred. An increase in temperature lead to a decrease in porosity and …
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Structural and optical properties of phase transition cubic phase gallium nitride for photonic devices
… transition behavior. Raman spectroscopy and cathodoluminescence show excellent phase purity and clearly controlled phase transition. Extensive optical characterization was conducted via polarization dependent photoluminescence and time-resolved photoluminescence to extract carrier …
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Characterisation of radiation effects in ultra-thin GaAs solar cells for space applications
… of radiation types and their characterisation by cathodoluminescence, both continuous wave and time-resolved, and current-voltage measurements. It is demonstrated that the preservation of short-circuit current up to high dose in ultra-thin solar cells can be attributed to the carrier lifetime …
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The interplay of structure and optical properties in individual semiconducting nanostructures
… evolve by altering precursor concentrations. The cathodoluminescence of nanowires grown by reaction-limited kinetics were quenched at the nanowire tips, likely due to point defects associated with the high Zn supersaturation required for reaction-limited growth. Further, cathodoluminescence was …
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Development of Multi-Microscopy Techniques for the Characterisation of Nitride Semiconductors
… (AFM) and scanning electron microscopy cathodoluminescence (SEM-CL), representative trench defects were lifted out, using the FIB methods developed previously, for examination by scanning TEM and energy dispersive X-ray spectroscopy. Trench defects with greater cathodoluminescence …
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A Nano-Scale Chemical and Structural Characterization of Chinook Salmon (Oncorhynchus tshawytscha) Otoliths Using a FIB and HRTEM
… electron microscopy (SEM) in conjunction with cathodoluminescence (CL) and high resolution transmission electron microscopy (HRTEM). The results constrained the relative distribution of several elements; silicon-enriched nodules were found in the post-hatch otolith, and manganese, an element …
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