Search for dissertations about: "photoluminescence"

Showing result 6 - 10 of 168 swedish dissertations containing the word photoluminescence.

  2. 6. Optical Studies of Single Quantum Dots

    Author : Jonas Persson; Fasta tillståndets fysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; nano-optics; quantum optics; photoluminescence; micro-photoluminescence; single photon generation; Semiconductory physics; Halvledarfysik; low-dimensional structures; quantum dots; Stranski-Krastanow; Fysicumarkivet A:2004:Persson;

    Abstract : This thesis presents spectroscopic studies of single self-assembled InP quantum dots (QDs). The electronic properties of these QDs have been studied by photoluminescence (PL) and scanning tunnelling luminescence (STL). The QDs were grown in the Stranski-Krastanow mode and were embedded in GaInP. READ MORE

  4. 7. Optical Studies and Applications of Single Quantum Dots

    Author : Valéry Zwiller; Fasta tillståndets fysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; time resolved photoluminescence; Physics; Fysik; Semiconductory physics; Halvledarfysik; Condensed matter:electronic structure; electrical; magnetic and optical properties; supraconductors; magnetic resonance; relaxation; spectroscopy; Kondenserade materiens egenskaper:elektronstruktur; egenskaper elektriska; magnetiska och optiska ; supraledare; spektroskopi; magnetisk resonans; microphotoluminescence; microcavities; photoluminescence; quantum optics; nano-optics; photonics; low dimensional structures; quantum dots; Fysicumarkivet A:2001:Zwiller;

    Abstract : The luminescence from single quantum dots has been studied. Single dot photoluminescence was studied under continuous as well as under pulsed excitation. Time-resolved studies revealed fast relaxations in quantum dots. The time resolved measurements were fitted with a set of rate equations. READ MORE

  5. 8. Photoluminescence in Conjugated Polymers : Experimental Investigations of Excited State Events

    Author : Mathias Theander; Linköpings universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : After an extensive scientific effort spent on the understanding of conjugated polymers and molecules, these material are on the border of commercialisation. Even though highly efficient devices can be made with conjugated polymers the underlying physics is far from being fully understood. READ MORE

  6. 9. Synthesis of Conjugated Polymers: Photoactive Substances for Photonic Devices

    Author : Mikael Johansson; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; synthesis; microcavity laser devices; electroluminescence; conjugated polymers; light-emitting diodes; photoluminescence; photooxidation; energy transfer;

    Abstract : Synthesis and characterization of conjugated polymers are the subject of this thesis, the goal of which is to synthesize polymers with properties that will make them suitable as the active materials in applications such as light-emitting diodes and microcavity laser devices. The two classes of conjugated polymers studied are poly(p-phenylenevinylenes) (PPVs) and polyfluorenes (PFs). READ MORE

  7. 10. Optical Studies of InAs Quantum Dots in III-V Semiconductors

    Author : Lars Landin; Fasta tillståndets fysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; quantum dots; III-V semiconductors; k.p calculations; photoluminescence; deep-level transient spectroscopy; photoconductivity; few particle effect; single dot spectroscopy; InAs InP; Semiconductory physics; Halvledarfysik; Fysicumarkivet A:2000:Landin; InAs GaAs;

    Abstract : I this thesis, optical studies of InAs quantum dots (QDs) in GaAs and InP are presented. The electronic structure of these zero dimensional structures, grown in the Stranski-Krastanow growth mode, was studied by photoluminescence spectroscopy (PL), junction space-charge techniques (JSCT) and photoconductivity (PC) measurements. READ MORE