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Research Collaboration within Bath University Optical spectroscopy of semiconductor structures and devices with Professor J J Davies and Dr D Wolverson. His group extensive experience of spin-flip Raman scattering and associated magneto-optical techniques in the study of II-VI epitaxial materials for green/blue devices and has recently extended these investigations to red-emitting GaAlInP and blue-violet-emitting GaInN alloys. Experimental Facilities. The experimental facilities of the group include systems for Raman and Raman microscopy, modulated reflectivity and photoluminescence spectroscopies, including a high-resolution, triple grating spectrometer equipped with both CCD and photomultiplier detectors and two superconducting magnets for the provision of strong magnetic fields. In addition, several CW laser sources are available, including visible and UV argon ion lasers, Ti-sapphire lasers and dye lasers covering the wavelength range from 400nm to 750nm. The optical magnetic resonance spectrometers currently operate at a frequency of 14 GHz , which will later be extended to 100 GHz. Device modelling is closely collaborated with Dr A B Walker in the simulation of electrical transport in novel semiconductor devices, both organic and inorganic, with possible extension to biological systems. Professor P G Coleman is our collaborator in the positron studies of thin films and surfaces of III-Nitrides. The positron laboratories at Bath are the only ones in Europe with the capability to pursue the study of positron interactions with solid surfaces. Many unique and largely unexplored phenomena remain to be investigated, including positron-annihilation-induced Auger electron emission and inelastic positron re-emission.
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