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Visar resultat 1 - 5 av 12 avhandlingar som matchar ovanstående sökkriterier.
1. Three-Dimensional Metal-Semiconductor Heterostructures for Device Applications
Sammanfattning : Fabrication and characterisation of buried metal contacts in compound semiconductors are demonstrated. The contacts have been investigated due to their usage both as gates in transistors and as active or passive elements in novel devices. LÄS MER
2. Epitaxial Lateral Overgrowth of Indium Phosphide and Its Application in Heteroepitaxy
Sammanfattning : Monolithic integration of optoelectronics on silicon is adream. This thesis deals with the studies on the heteroepitaxyof indium phosphide on silicon substrate towards making thatdream come true. Materials growth issues, characterization anddefect identification are addressed. LÄS MER
3. Investigation of New Concepts and Solutions for Silicon Nanophotonics
Sammanfattning : Nowadays, silicon photonics is a widely studied research topic. Its high-index-contrast and compatibility with the complementary metal-oxide-semiconductor technology make it a promising platform for low cost high density integration. LÄS MER
4. Epitaxial III-V/Si heterojunctions for photonic devices
Sammanfattning : 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. LÄS MER
5. New Methods in the growth of InP on Si and Regrowth of Semi-insulating InP for Photonic Devices
Sammanfattning : This thesis addresses new methods in the growth of indium phosphide on silicon for enabling silicon photonics and nano photonics as well as efficient and cost-effective solar cells. It also addresses the renewal of regrowth of semi-insulating indium phosphide for realizing buried heterostructure quantum cascade lasers with high power and wall plug efficiency for sensing applications. LÄS MER