Search for dissertations about: "GaAs AlGaAs"
Showing result 16 - 20 of 41 swedish dissertations containing the words GaAs AlGaAs.
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16. Development of 1.3-μm GaAs-based vertical-cavity surface-emitting lasers
Abstract : Long-wavelength vertical-cavity surface-emitting lasers (VCSELs) are desirable as low-cost sources for optical metropolitan-area and access networks. In the development of 1.3-µm VCSELs, most attention today is given to monolithic GaAs-based solutions, although no established active material exists in this wavelength region. READ MORE
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17. Electron Transport in Low Dimensional Systems
Abstract : This thesis consists of experimental studies of transport properties in high mobility two dimensional electron gases (2DEGs). Two material systems are used, an AlGaAs/GaAs heterojunction and a GaInAs/InP quantum well. READ MORE
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18. Studies of Novel Nanostructures by Cross- sectional Scanning Tunneling Microscopy
Abstract : This thesis presents structural and morphological studies of semiconductor nanostructures, namely quantum dots, nanowires and a dilute ferromagnetic semiconductor. These nanostructures are investigated on the atomic scale using cross-sectional scanning tunneling microscopy (XSTM). READ MORE
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19. Long-Wavelength Vertical-Cavity Lasers : Materials and Device Analysis
Abstract : Vertical-cavity lasers (VCLs) are of great interest as lightsources for fiber-optic communication systems. Such deviceshave a number of advantages over traditional in-plane laserdiodes, including low power consumption, efficient fibercoupling, on-chip testability, as well as potential low-costfabrication and packaging. READ MORE
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20. Leveraging HVPE for III-V/Si Integration and Mid-Infrared Photonic Device Fabrication
Abstract : This work covers the implementation of highly specialized epitaxial techniques enabled by the near-equilibrium hydride vapor-phase epitaxy growth process in III-V/Si integration for Si-based tandem solar cells and photoelectrochemical reactions, quasi phase matching GaP structures on GaAs substrates, and regrowth of InP:Fe on quantum cascade lasing structures.III-V/Si integration is an important topic in several fields of research with a significant one being solar energy harvesting. READ MORE