| Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
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| Outline of Final Research Achievements |
The control theory of laser-induced ring currents nonadiabatically coupled with skeletal vibration in aromatic molecules has been extended to general pi-conjugated systems. Contrary to a recent semiclassical study that suggested the participation of several optically dark states in ultrafast internal conversion of pyrazine, quantum dynamical calculations demonstrated that the nonadiabatic transition to the lowest dark state occurs directly after optical excitation, and that the transition rate is much faster than previously estimated in experiments. The present theory was also applied to C60 and its derivatives. The decisive factor of ellipticity-dependent multiphoton excitation probability in spherical systems such as C60 is transition moment magnitudes. Polyhydroxy fullerenes heated by near-infrared lasers undergo H2O and CO evaporations. The cage structure is then broken into a graphene-like flake form, leading to coalescence into larger nanocarbons such as carbon nanotubes.
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