Éditeur University of Surrey
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Various diagnostic methods used in detrmining bone status are reviewed. Two methods using scattered photons for determination of bone density have been studied. The first involved the measurement of the ratio of coherent to Compton scattered p[...]
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Silicon wafers have been implanted with 400 keV molecular oxygen, with a dose of 1.8 x 10¹⁸ O⁺/cm² at an implantation temperature of about 500°C. The wafers were annealed at 1200°C for 2 hours with SiO₂ cap. Rutherford backscattering has been [...]
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Rapid thermal annealing was used to produce n+ surface layers in tin- and selenium-implanted GaAs. Hall effect and differential Van der Pauw measurements were performed and peak electron carrier concentrations of about 9 x 10¹⁸ cm-³ with corres[...]
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This thesis is concerned with the improvement of semiconductor laser characteristics using valence band engineering. We first show that the combination of strain and quantum confinement can confer considerable advantages to long wavelength lase[...]
