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中国物理快报 2008
High Resolution Mode-Selective Excitation by Adaptive Femtosecond Pulse ShapingKeywords: 42,65,Dr,33,80,-b,82,50,Pt,82,53,Kp,82,53,Uv Abstract: High resolution mode-selective excitation in the mixture of C6H6 (992cm-1) and C6D6 (945cm-1) is experimentally achieved by adaptive femtosecond pulse shaping based on the genetic algorithm (GA), and second harmonic generation frequency-resolved optical gating (SHG-FROG) is adopted to characterize the original and optimal laser pulses, and its mechanism is experimentally validated by tailoring the frequency components of the pump pulses at the Fourier plane. It is indicated that two-pulse coherent mode-selective excitation of the Raman scattering mainly depends on the effectivefrequency components of the pump pulse related to specific molecular vibrational mode. The experimental results have attractive potential applications in the complicated molecular system.
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