Search for dissertations about: "Femtosecond laser pulses"

Showing result 16 - 20 of 55 swedish dissertations containing the words Femtosecond laser pulses.

2. 16. Femtosecond Dynamics in Water and Biological Materials with an X-Ray Laser

   Author : H. Olof Jönsson; Carl Caleman; Nicusor Timneanu; Olle Björneholm; David van der Spoel; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Physics with specialization in Biophysics; Fysik med inriktning mot biofysik;

   Abstract : Using high intensity ultrashort pulses from X-ray free electron lasers to investigate soft matter is a recent and successful development. The last decade has seen the development of new variant of protein crystallography with femtosecond dynamics, and single particle imaging with atomic resolution is on the horizon. READ MORE

4. 17. Electronic materials : growth and characterisation

   Author : Michael A. Grishin; Ulf O. Karlsson; Massimo Sancrotti; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electrophysics; Photoemission; Ultra-short laser pulse; Thin film; Laser deposition; InSb; InAs; GaSb; Ferroelectrics; Elektrofysik; Electrophysics; Elektrofysik;

   Abstract : In this thesis the InSb(111), InAs(111) and GaSb(001) surfaces have been studied by means of time- and angle-resolved photoemission spectroscopy based upon the femtosecond laser system. The pump-and-probe technique allows to analyse both electron states in the valence band and normally unpopulated electron states above the valence band, which can be occupied by transiently excited carriers at the optically pumped surface. READ MORE

5. 18. Temporal Studies of Molecular Processes using Resonant Spectroscopy : Femtosecond experiments with synchrotron radiation and pulsed lasers

   Author : Ingela Hjelte; Dennis Lindle; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physics; Fysik; Physics; Fysik; fysik; Physics;

   Abstract : The physical and chemical properties of matter are to a high degree determined by the electronic structure. One of the most powerful experimental techniques to study the electronic structure is electron spectroscopy. READ MORE

6. 19. Femtosecond Dynamics of Dissociation and Isomerization Reactions in Solutions

   Author : Jose-Luis Alvarez; Kemisk fysik; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; optics; Electromagnetism; Photochemistry; Fotokemi; acoustics; Elektromagnetism; optik; akustik; Fysicumarkivet A:1997:Alvarez;

   Abstract : The main purpose of this work has been to investigate the fundamental dynamics of photodissociation and photo-induced isomerization reactions in the condensed phase. These "elementary" reactions have been chosen as model processes for exploring the influence of the solvent on a chemical event, as well as the factors that control this influence. READ MORE

7. 20. Bright Lights: Innovative Micro- and Nano-Patterning for Sensing and Tissue Engineering

   Author : Alessandro Enrico; Göran Stemme; Frank Niklaus; Anna Herland; Jürgen Brugger; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Micro-electromechanical systems MEMS ; nanotechnology; nanowires; microfabrication; tissue engineering; crack-lithography; direct writing; femtosecond lasers; two-photon polymerization; 3D micromachining; cavitation molding; scalable optical patterning; 2D materials; surface structuring; bacterial-surface interaction.; Electrical Engineering; Elektro- och systemteknik;

   Abstract : Light is the primary source of energy on our planet and has been a significant driver in the evolution of human society and technology. Light finds applications in two-dimensional (2D) photolithography and three-dimensional (3D) printing, where a pattern is transferred to a material of interest by ultraviolet (UV) light exposure, and in laser scribing and cutting, where high power lasers are used to pattern the surface of objects or cut through the bulk of the material of interest. READ MORE