Sökning: "photoluminescence"

Visar resultat 21 - 25 av 168 avhandlingar innehållade ordet photoluminescence.

  1. 21. Zeeman Interaction in Low-Dimensional III-V Semiconductor Structures

    Författare :Bernhard Kowalski; Fasta tillståndets fysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; optically detected spin resonance; spin resonance; effective g-value; III-V semiconductors; low-dimensional structures; quantum wells; quantum dots; Stranski-Krastanow; photoluminescence; GaInAs; single dot Magneto-luminescence; Fysicumarkivet A:1997:Kowalski; Halvledarfysik; Semiconductory physics; GaInAs-InP;

    Sammanfattning : The Zeeman interaction in low-dimensional III-V semiconductor nanostructures is studied. The effective g-value of bulk InGaAs is measured by two different spin resonance techniques. Experimental conditions were found to control the Overhauser effect, thus enabling a highly accurate determination of the g-value, g* = -4.070 ± 0. LÄS MER

  3. 22. Top-down Fabrication Technologies for High Quality III-V Nanostructures

    Författare :Shagufta Naureen; Srinivasan Anand; Clivia M. Sotomayor Torres; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; III-V nanostructures; colloidal lithography; top-down fabrication; dry etching; quantum well; multilayer structures; nanowires; nanopillars; nanodisks; mono-layer etching; surface passivation; photoluminescence; carrier life time; total reflectivity; photonic crystals; nanomesh;

    Sammanfattning : III-V nanostructures have attracted substantial research effort due to their interesting physical properties and their applications in new generation of ultrafast and high efficiency nanoscale electronic and photonic components. The advances in nanofabrication methods including growth/synthesis have opened up new possibilities of realizing one dimensional (1D) nanostructures as building blocks of future nanoscale devices. LÄS MER

  4. 23. Fabrication and characterization of single luminescing quantum dots from 1D silicon nanostructures

    Författare :Benjamin Bruhn; Jan Linnros; Luca Dal Negro; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; silicon; quantum dot; nanocrystal; nanowire; nanostructure; photoluminescence;

    Sammanfattning : Silicon as a mono-crystalline bulk semiconductor is today the predominant material in many integrated electronic and photovoltaic applications. This has not been the case in lighting technology, since due to its indirect bandgap nature bulk silicon is an inherently poor light emitter. LÄS MER

  5. 24. Polymer Components for Photonic Integrated Circuits

    Författare :Aleksandrs Marinins; Sergei Popov; Leif Katsuo Oxenlowe; KTH; []
    Nyckelord :integrated photonics; polymers; optical communications; microfabrication; optical waveguides; microring resonators; silicon; Si nanocrystals; photoluminescence; Fysik; Physics;

    Sammanfattning : Optical polymers are a subject of research and industry implementation for many decades. Optical polymers are inexpensive, easy to process and flexible enough to meet a broad range of application-specific requirements. These advantages allow a development of cost-efficient polymer photonic integrated circuits for on-chip optical communications. LÄS MER

  7. 25. Optical Properties of Single Silicon Quantum Dots

    Författare :Federico Pevere; Jan Linnros; Uwe Kortshagen; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; silicon; nanocrystals; quantum dots; photoluminescence; optics; emission; absorption; Fysik; Physics;

    Sammanfattning : For over 60 years silicon (Si) has dominated the semiconductor microelectronics industry mainly due to its abundance and good electrical and material properties. The advanced processing technology of Si has made it the workhorse for photovoltaics industry as well. LÄS MER