Sökning: "Regrowth"

Visar resultat 1 - 5 av 57 avhandlingar innehållade ordet Regrowth.

1. 1. Gallium arsenide based buried heterostructure laser diodes with aluminium-free semi-insulating materials regrowth

   Författare :Carlos Angulo Barrios; KTH; []
   Nyckelord :semiconductor lasers; in-plane lasers; VCSELs; GaAs; GaInP; semi-insulating materials; hydride vapour phase epitaxy; regrowth; buried heterostructure; leakage current; simulation;

   Sammanfattning : Semiconductor lasers based on gallium arsenide and relatedmaterials are widely used in applications such as opticalcommunication systems, sensing, compact disc players, distancemeasurement, etc. The performance of these lasers can beimproved using a buried heterostructure offering lateralcarrier and optical confinement. LÄS MER

3. 2. Scanning capacitance microscopy for semiconductor characterisation

   Författare :Olle Bowallius; KTH; []
   Nyckelord :SCM; SSRM; InP; Si; Buried heterostructure laser; Doping; Regrowth; Capacitance; P-n junction;

   Sammanfattning : .... LÄS MER

4. 3. Design and fabrication of long wavelength vertical cavity lasers on GaAs substrates

   Författare :Rickard Marcks von Würtemberg; Mattias Hammar; Markus Amann; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; VCSEL; Selective Area Epitaxy; Epitaxial regrowth; Laser; Semiconductor physics; Halvledarfysik;

   Sammanfattning : Vertical cavity surface emitting lasers (VCSELs) are today a commodity on the short wavelength laser market due to the ease with which they are manufactured. Much effort has in the last decade been directed towards making long wavelength VCSELs as successful in the marketplace. LÄS MER

5. 4. Metall organic vapour phase epitaxy for advanced III-V devices

   Författare :Nils Nordell; Sture Petersson; Gunnar Landgren; Ferdinand Scholz; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Metalorganic vapour phase epitaxy MOVPE ; III-V compound semiconductors; epitaxial uniformity; p-type doping profiles; epitaxial regrowth; chlorine-MOVPE; buried heterostructure laser; heterostructure bipolar transistor; Electrical Engineering; Elektro- och systemteknik;

   Sammanfattning : Metalorganic vapour phase epitaxy (MOVPE) has proven to be a successful method for growth of structures for advanced optoelectronic semiconductor devices in III-V compounds. This thesis deals with technological and process related aspects of MOVPE from an experimental perspective. LÄS MER

7. 5. Pathogen inactivation and regrowth in organic waste during biological treatment

   Författare :Josefine Elving; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
   Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

   Sammanfattning : After proper sanitation treatment, organic wastes such as animal by-products, e.g.catering waste, slaughterhouse waste and manure can be used as fertilisers and soil conditioners and thereby contribute to a sustainable society. LÄS MER