Sökning: "Two-photon absorptions"

Hittade 3 avhandlingar innehållade orden Two-photon absorptions.

  1. 1. Theoretical study on nonlinearoptical properties of organicchromophores in solutions

    Författare :Ke Zhao; Yi Luo; Ruth Pachter; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; two-photon absorption; solvent effects; aggregation effects; molecular dynamics simulation; Theoretical chemistry; Teoretisk kemi;

    Sammanfattning : Inter-molecular interactions have significant influences on linear and nonlinear optical properties of molecules including one- and two-photon absorptions, emissions, and various high order nonlinear polarizations. The related investigation has become an active and challenging research area. LÄS MER

  3. 2. Theoretical study of light-molecule nonlinear interactions

    Författare :Ke Zhao; Yi Luo; Fahmi Himo; Valdas Pasiskevicius; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Bioengineering; Bioteknik;

    Sammanfattning : The work presented in the thesis concerned theoretical study of light-matter nonlinear interactions. Two important aspects of such interactions have been examined, namely the nonlinear optical properties of a series of organic charge transfer molecules in solutions induced by the laser light and the propagation of the ultrafast high power laser through the nonlinear molecular medium. LÄS MER

  4. 3. Efficient Calculation of Nonlinear Spectroscopic Properties within the Time-Dependent Density Functional Theory Approximation

    Författare :Karan Ahmadzadeh; Patrick Norman; Johannes Neugebauer; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Cubic response; DFT; Response theory; Theoretical Chemistry and Biology; Teoretisk kemi och biologi;

    Sammanfattning : This thesis introduces a novel computational scheme tailored for efficient calculations of nonlinear spectroscopic observables. First, a derivation and implementation of an algorithm designed to harness the linearity of the Fock matrix construction in calculating two-photon absorption cross-sections within the self-consistent field approximation is presented. LÄS MER