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- W2016976786 abstract "The nonlinear optical response (NLO) of linear polyenes and fullerenes is studied using an anharmonic oscillator model. The influence of size effects and quantum exciton confinement on the nonlinear optical response is examined, and the time evolution of the excitons is studied. The elementary optical excitations for C<SUB>60</SUB> are shown to be correlated charge density fluctuations. For linear polyenes with finite size, oscillations in the time-resolved degenerated four wave mixing (D4WM) signal due to the coherent excitation of several band states are found within the Huckel model (no Coulomb interaction). For infinite size a photon echo like behavior is obtained. The exciton-exciton interaction changes the lineshape of the D4WM signal and gives rise to a broad delayed signal whose position is given by the dephasing time of the system." @default.
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- W2016976786 date "1993-07-23" @default.
- W2016976786 modified "2023-09-23" @default.
- W2016976786 title "<title>Quantum confinement and nonlinear optical response of conjugated molecules</title>" @default.
- W2016976786 doi "https://doi.org/10.1117/12.148452" @default.
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