Search for dissertations about: "Multi-photon absorption"

Showing result 1 - 5 of 11 swedish dissertations containing the words Multi-photon absorption.

  1. 1. Multi-Photon Interactions with a Time Structure

    University dissertation from Stockholm : Bioteknologi

    Author : Alexander Baev; KTH.; [2003]
    Keywords : nonlinear optics; two-photon absorption; mirrorless lasing; charge-transfer chromophores; solutions; resonant photoemission; life-time vibrational interference; scattering duration time; electron Doppler effect; polymers;

    Abstract : The present thesis concerns aspects of the interaction ofmatter in gas, liquid and solid phases, with electromagneticradiation, ranging from the optical to the X-ray region. Overthe last decade the availability of ultrashort strong laserpulses as well as of high power synchrotron sources of tunableX-ray radiation has stimulated a rapid development of newexperimental techniques which makes it possible to analysedifferent physical, chemical and biological processes inunprecedented detail. READ MORE

  2. 2. Theoretical Studies on Electronic and Vibrationally Resolved Multi-Photon Absorption and Dichroism

    University dissertation from Stockholm : KTH

    Author : Na Lin; KTH.; [2009]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Multi-photon absorption and dichroism; Vibronically resolved spectroscopy; NATURAL SCIENCES Chemistry Theoretical chemistry Quantum chemistry; NATURVETENSKAP Kemi Teoretisk kemi Kvantkemi;

    Abstract : This thesis presents time-dependent density functional theory studies on electronic and vibronically resolved linear and nonlinear optical absorption and dichroism spectra of organic molecules. Special attention has been paid to the influence of solvent environment and molecular vibrations on one-, two- and three-photon absorption and one- and two-photon circular dichroism. READ MORE

  3. 3. Quantum chemical calculations of non-linear optical absorption

    University dissertation from Stockholm : Bioteknologi

    Author : Peter Cronstrand; Mälardalens högskola.; KTH.; [2004]
    Keywords : quantum chemical; non-linear optical; multi-photon absorption;

    Abstract : This thesis represents a quantum chemical treatise ofvarious types of interactions between radiation and molecularsystems, with special emphasis on the nonlinear opticalprocesses of Multi-Photon Absorption and Excited StateAbsorption. Excitation energies, transition dipole moments,two-photon and three-photon tensor elements have beencalculated from different approaches; density functional theoryandab-initiotheory, employing different orders ofcorrelation treatment with the purpose to provide accuratevalues as well as evaluate the quality of the lower ordermethods. READ MORE

  4. 4. Resonant multi-photon ionisation studies of high-energy states in small molecules

    University dissertation from Stockholm : KTH

    Author : Marica Sjödin; KTH.; [2005]

    Abstract : This thesis describes separate studies of high-energy Rydberg and ion-pair states in small molecules using resonant multi-photon ionisation spectroscopy.* OODR/REMPI study of ungerade Rydberg states in O2The energy region between 75000 and 99900 cm-1 of O2 has been studied using optical-optical double resonance (OODR) with resonance enhanced multi-photon ionisation (REMPI). READ MORE

  5. 5. Theoretical perspectives on ultrafast and non-linear spectroscopy

    University dissertation from Lund University, Faculty of Science, Department of Physics

    Author : Emil Vinas Boström; [2018-05-07]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Non-linear optics; Ultrafast dynamics; Non-equilibrium Green s functions; Density functional theory; Multi-photon absorption; Second harmonic generation; Desorption dynamics; Auger decay; Charge-separation dynamics; Quantum Zeno effect; Fysicumarkivet A:2018:Vinas Boström;

    Abstract : In this thesis we discuss a theoretical description of ultrafast and non-linear spectroscopy. Due to the high intensities and ultrashort pulse durations involved in such experiments, it is necessary to use an explicitly time-dependent formalism. READ MORE