Sökning: "Jonas Sjöqvist"

Hittade 3 avhandlingar innehållade orden Jonas Sjöqvist.

  1. 1. Light interactions in flexible conjugated dyes

    Författare :Jonas Sjöqvist; Patrick Norman; Per-Olof Åstrand; Linköpings universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; force field; molecular dynamics; QM MM; solvation effects; absorption spectroscopy; fluorescence spectrosocopy; infrared spectroscopy; Raman spectroscopy; stokes shift; conjugated polyelectrolytes;

    Sammanfattning : In this thesis methodological developments have been made for the description of flexible conjugated dyes in room temperature spectrum calculations.The methods in question target increased accuracy and efficiency by combining classical molecular dynamics (MD) simulations with time-dependent response theory spectrum calculations. LÄS MER

  2. 2. Luminescence properties of flexible conjugated dyes

    Författare :Jonas Sjöqvist; Patrick Norman; Mikael Lindgren; Jacob Kongsted; Linköpings universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; force field; molecular dynamics; linear absorption; QM MM; absorption spectrum; emission spectrum; water solvation; stokes shift;

    Sammanfattning : In this licentiate thesis the luminescence properties of two flexible conjugated dyes have been studied. The first, Pt1, is a platinum(II) acetylide chromophore used in optical power limiting materials. LÄS MER

  3. 3. Novel materials for Yb and Er-Yb doped microchip lasers

    Författare :Jonas Hellström; Fredrik Laurell; Lars Sjöqvist; KTH; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; mid-IR lasers; laser materials; Optical physics; Optisk fysik;

    Sammanfattning : The objective of this thesis has been to investigate novel host material configurations for high-power end-pumped Er-Yb co-doped, or Yb doped microchip lasers and try to increase their performance. In Er-Yb co-doped systems, the main limitation is the thermal shortcomings of the phosphate glass host material. LÄS MER