Physics

This thesis touched upon the effect of iron doping on the structural, morphological, compositional, optical and dielectric properties of bismuth oxide thin films. Bismuth oxide thin films with a thickness of 0.50 μm were deposited by thermal evaporation of bismuth oxide powders on glass substrates under a vacuum pressure of approximately 4-10 mbar. This was followed by doping the films with iron by mixing the iron nano-powders with the bismuth oxide powders before evaporation. The researcher used three increasing amounts of iron for this purpose.

This research explores quantum-dot lasers that use quantum dots as active materials. Quantum-dot lasers operate based on tight confinement of charge carriers in quantum-dots, where a wide range of applications in medical imaging, sensing, quantum information processing and optical communications are found. Due to its vital role in disease treatment and optical imaging, in addition to its high capacity in data processing, new approaches are being used to improve its performance.