Development of new two-pulse correlation technique for observation and analysis of multiphoton reaction

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In the present study, two experimental techniques, namely asymmetric two-pulse correlation (as-2PC) technique for understanding excitation/reaction dynamics through multiphoton/multistep excitation process and Fourier transform two-dimensional excitation spectrum (FT-2DES) measurement system for clarify the excitation/reaction paths, were developed. The latter is the basis system of Fourier transform two-pulse correlation method. Then by combining the as-2PC method and the FT-2DES system, new observation and analysis technique for understanding the excitation/reaction pathways. In particular, in the FT-2DES measurement system, the increase of modulation depth was succeeded by using the tandem type Fabry-Perot interferometer to a modulation of the excitation light.