Search for dissertations about: "Femtosecond laser pulses"

Showing result 21 - 25 of 55 swedish dissertations containing the words Femtosecond laser pulses.

  2. 21. Electronic and Vibrational Coherence in Photosynthetic and Model Systems

    Author : Mirianas Chachisvilis; Kemisk fysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Kemi; Chemistry; Ultrafast relaxation; Porphyrins; Delocalization; Anisotropy; Wavepacket; Vibrational Coherence; Excitons; Electronic coherence; Energy transfer; Femtosecond spectroscopy; Photosynthesis;

    Abstract : Ultrafast optical response and excitation energy dynamics in light harvesting pigment-protein complexes and in a few model systems have been studied both experimentally and theoretically. Femtosecond light pulses were employed to excite the system and monitor the subsequent time evolution of the transient absorption kinetics and anisotropy. READ MORE

  4. 22. On the Use of Rotational CARS on Polyatomics and in Time Domain

    Author : Ali Hosseinnia; Förbränningsfysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Rotational CARS; Laser Diagnostics; Ethylene; Ethane; Internal Rotation; Coherent Lifetime; ultrafast spectroscopy; Fysicumarkivet A:2020:Hosseinnia;

    Abstract : This thesis work concerns the further developments of dual-broadband rotational coherent anti-Stokes Raman spectroscopy (RCARS) through experimental and theoretical investigations. Rotational CARS is an established technique for gas-phase thermometry and concentration measurement with major applications in combustion diagnostics. READ MORE

  5. 23. Ultrafast Structural and Electron Dynamics in Soft Matter Exposed to Intense X-ray Pulses

    Author : Olof Jönsson; Carl Caleman; Nicusor Timneanu; Olle Björneholm; Jörgen Larsson; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; X-ray free-electron laser; Serial Femtosecond Crystallography; Radiation Damage; Plasma Simulations; Ultrafast Lasers; X-ray Imaging; Diffraction Theory; Ultrafast Phenomena; Hit Detection; Plasma Emission Spectra; Serial Femtosecond Crystallography; Protein Structure; Protein Crystallography; Metalloprotein; Non-thermal Heating; Water; Ferredoxin; NLTE Simulation; XFEL; FEL; SFX; Physics with specialization in Biophysics; Fysik med inriktning mot biofysik;

    Abstract : Investigations of soft matter using ultrashort high intensity pulses have been made possible through the advent of X-ray free-electrons lasers. The last decade has seen the development of a new type of protein crystallography where femtosecond dynamics can be studied, and single particle imaging with atomic resolution is on the horizon. READ MORE

  6. 24. Structural studies of small viruses using an X-ray Free Electron Laser

    Author : Anna Munke; Marvin Seibert; Dirk Hasse; Inger Andersson; Carl Caleman; Maria Selmer; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physics with specialization in Biophysics; Fysik med inriktning mot biofysik;

    Abstract : X-ray crystallography has since its introduction been the most successful technique for solving protein structures. Viruses however, often possess structural components such as fibrils, tails and envelopes that make them difficult or impossible to crystallize. READ MORE

  7. 25. Characterization of Ultrashort Pulses And Ultrafast Dynamics of Molecules In the Liquid Phase

    Author : Ming Liu; KTH; []
    Keywords : Ultrafast Spectrascopy;

    Abstract : This thesis reports an alternative method for fully acomplete characterization of the UV pump pulse and white lightcontinuum probe pulse, which is commonly used in the pump-probeexperiments to investigate the ultrafast dynamics of molecules.Besides that, real dynamics of infrared cyanine dye molecules(Methyl-DOTCI) and photo-induced dissociation of trihalide ions(I3-or I2Br-) solvated in different organic solvent has alsobeen carefully investigated. READ MORE