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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 13 of 13 for “"doped crystals"”.
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Quantum Optics and Quantum Information Processing in Rare-Earth-Ion-Doped Crystals
… the use of cryogenically cooled rare-earth-ion-doped crystals in the fields of quantum optics and quantum information processing are addressed. The experiments and theoretical considerations referred to in this thesis are based on the coherent transient interaction between light and the ions in …
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Coherent Interactions in Rare-Earth-Ion-Doped Crystals for Applications in Quantum Information Science
… the use of cryogenically cooled rare-earth-ion-doped crystals for quantum information processing and quantum optics. Several aspects of the coherent interaction between light and rare-earth ions in solids are addressed. Quantum information science has given physicists new views of quantum …
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Phonon scattering from substitutional impurities and lattice defects in silver chloride
… and lattice defects in silver chloride crystals by means of the thermal conductivity technique. In addition, far infrared absorption measurements were made on some of the doped crystals. The thermal conductivity of silver chloride as a function of the concentrations of eight impurities-- …
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Phonon scattering from substitutional impurities and lattice defects in cadmium sulfide
… has been measured from 1.4°K to 80 0K for doped and pure cadmium sulfide single crystals of the wurtzite structure. The crystals were grown by a modified Bridgeman technique under 100 atmospheres of argon at 1100°C by the Eagle Picher Corporation. The experimental results for the pure …
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The effect of high pressure on S and Te-doped GaAs1-xPx
… of 770, 195 0 , and 300 0 K. The samples are doped with sulfur and tellurium and have carrier concentrations in the 10^18 - 10^19 range. Changes in the resistivity as large as four orders of magnitude are observed at 77 0K for samples in the composition range 0.30 ~ x ~ 0.4~ The behavior of …
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Magnetoresistance and Thermoelectricity in Quasi-Low Dimensional Semimetals
… the quasi-1D layered material ZrTe₅. For vacancy doped crystals, we report a transport, thermodynamic, and spectroscopic study with a focus on elucidating the connections between its band structure and unusual thermoelectric properties. For crystals in the stoichiometric limit, we report the …
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Space charge resulting from imperfections and effects thereof in ionic crystals
… are discussed. Calculations are given for crystals in which Schottky disorder predominates as well as for crystals in which Frenkel disorder predominates. Calculations of the equilibrium defect distribution for crystals containing divalent impurities are also given. Again it is shown, that, …
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Coherent Processes in Rare-Earth-Ion-Doped Solids
… experimentally implemented using rare-earth-ion-doped crystals. The rare-earths are a class of elements that have in common, an atomic structure that allows for very long lifetimes as well as coherence times, both on optical transitions and on spin transitions. These ions can be naturally trapped …
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Rare-earth-doped gallium lanthanum sulphide glasses for mid-infrared fibre lasers
… as a potential host material for rare-earth (RE) doped mid-infrared fibre lasers. <br/><br/>Glasses were fabricated from gallium sulphide and lanthanum sulphide powders by melt quenching and drawn into fibres using the rod-in-tube technique. Typical values for the attenuation in the loss minimum …
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Characterization of collective phenomena in cuprate superconductors by momentum-resolved electron energy loss spectroscopy
… superconductors. In studying optimally doped crystals, we have performed a full energy and momentum characterization of the low-energy dynamic susceptibility. Our measurement identifies known phonon modes, as previously seen in Raman scattering, infrared spectroscopy, and HR-EELS. Using …
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Quantum computing with naturally trapped sub-nanometre-spaced ions
… controlled NOT gate in rare-earth-metal-ion-doped crystals. Small amounts of rare-earth elements, added during the growth of some inorganic crystals, will become substituted into the crystal lattice as trivalent ions. The trivalent rare-earth-metal ions between cerium, with atomic number 58, …
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Electron spin resonance of trivalent neodymium pairs in anhydrous lathanum trichloride and lanthanum tribromide
… 4, 20K and 9 kMc/sec, These studies were made on crystals doped from 0,1 to 2, a atomic percent with enriched even-even isotopes of neodymium, The observed spectra can be described in terms of a spin Hamiltoniam containing a Zeeman term and a traceless coupling tensor A .. between two effective …
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Towards single Ce ion detection in a bulk crystal for the development of a single-ion qubit readout scheme
… spectroscopic properties of Ce ions randomly doped in an Y2SiO5 crystal at low temperatures (around 4 K), in order to develop a technique and an experimental set-up to detect the fluorescence photons emitted by a single Ce ion. The aim of the work was to determine whether a single Ce ion …