Search for dissertations about: "Harri Lipsanen"
Found 3 swedish dissertations containing the words Harri Lipsanen.
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1. Epitaxial III-V/Si heterojunctions for photonic devices
Abstract : Monolithic integration of III-V materials on silicon is of great interest for efficient electronic-photonic integrated devices and multijunction solar cells on silicon. However, defect formation in the heteroepitaxial layers due to lattice mismatch, thermal mismatch, and polarity mismatch makes it a great challenge. READ MORE
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2. Compound semiconductor materials and processing technologies for photonic devices and photonics integration
Abstract : The advancement of semiconductor optoelectronics relies extensively on materials and processing technologies of ever-increasing sophistication, such as nanometer-range lithography, epitaxial growth methods with monatomic layer control, and anisotropic etching procedures that allows for the precise sculpturing of device features even in the limit of extreme aspect ratios. However, upcoming application needs puts requirements on optimized designs or device performances, e. READ MORE
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3. 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