Search for dissertations about: "one-photon absorption"

Showing result 1 - 5 of 17 swedish dissertations containing the words one-photon absorption.

  2. 1. Theoretical Characterization of Optical Processes in Modecular Complexes

    Author : Kai Liu; Yi Luo; Benoît CHAMPAGNE; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; one-photon absorption; two-photon absorption; surface-enhanced Raman scattering; Theoretical chemistry; Teoretisk kemi;

    Abstract : The main theme of this thesis is to study effects of different environments on geometric and electronic structures, as well as optical responses, of molecules using time-(in)dependent density functional theory. Theoretical calculations have been carried out for properties that can be measured by conventional and advanced experimental techniques, including one-photon absorption (OPA), two-photon absorption (TPA), surface-enhanced Raman scattering (SERS) and second order nonlinear optical (NLO) response. READ MORE

  4. 2. Applications of Chromophores and Multiphoton Techniques to Study Structure and Interactions of Bio-macromolecules in Assembled State

    Author : Piotr Hanczyc; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Z-scan; One-photon spectroscopy; oxazole yellow dyes; two-photon absorption.; non-linear spectroscopy; PVA DNA dyes films; linear dichroism; ruthenium complexes;

    Abstract : The research presented in this thesis is concerned with the linear and nonlinear optical properties of biopolymers and the chromophores that bind to them. This thesis combines analyses of the interactions of biomolecules with technological improvements of already existing systems for bionanotechnology-related research. READ MORE

  5. 3. Photophysics of Perovskite Nano- and Microcrystals

    Author : Junsheng Chen; NanoLund: Centre for Nanoscience; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Ultrafast spectroscopy; Two-photon absorption; Perovskite; Nanocrystals; Photostability; Lead free perovskite;

    Abstract : The demand and consumption of energy is increasing dramatically all around the world. Broad adoption of fossil fuels has triggered an enormous threat to the environment. To ensure sustainability of our species and habitat, new solutions to fulfill the energy demand have to be found. READ MORE

  6. 4. Electron-nuclear Dynamics in Nonlinear Optics and X-ray spectroscopy

    Author : Sergey Polyutov; Faris Gelmukhanov; Patrick Norman; KTH; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Biochemistry; Biokemi;

    Abstract : This thesis is devoted to theoretical studies of the role of nuclear vibrations on nonlinear and linear absorption, pulse propagation, and resonant scattering of light. The molecular parameters needed for the simulations are obtained through suitable quantum chemical calculations, which are compared with available experimental data. READ MORE

  7. 5. Electron-vibration coupling and its effects on optical and electronic properties of single molecules

    Author : Guangjun Tian; Yi Luo; Volkhard May; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : The thesis is devoted to theoretical investigations of electron-vibration coupling and its effects on optical and electronic properties of single molecules, especially for molecules confined between metallic electrodes.A density-matrix approach has been developed to describe the photon emission of single molecules confined in the scanning tunneling microscope (STM). READ MORE