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We report quantitative spectrally-resolved transient absorption in GaAs quantum wells for varying pump intensity. Comparison to microscopic modeling yields quantitative information about the Coulomb-induced nonlinearities and radiative coupling.
Degenerate four-wave mixing spectrum and the temperature dependence are investigated in a CuCl thin film with high crystalline quality. The signal at room temperature is firstly observed.
Nonlinear index was investigated in undoped and Yb-doped monoclinic double-tungstates for EparNm and EparNp polarized 819 nm light. Anisotropic n2 with maximum for EparNm in all investigated compounds is proportional to the rare earth ion polarizability.
By varying the polarization and delay between two ultrashort laser pulses, we control the plane, speed, and sense of molecular rotation. This control may be implemented to individual components within a molecular mixture.
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