Multi-dimensional wave-packet dynamics in potoinduced phase transition materials

<Transition metal complexes>我们研究了低温下Pt-Br的时间分辨发光。我们发现，在波包振荡的低能端，发光强度急剧增加。当WP的主要部分转向高能量端时，一些部分走向相反的方向。通过与模型计算结果的比较，我们发现WP分裂发生在连接自陷激子（STE）和孤子对态的绝热势曲线的顶部。我们发现，STE状态不存在于这种材料中，尽管电荷密度波（CDW）的基态。WP传播到低于带隙的状态而没有振荡。这反映了代表从Peierls绝缘体到Mott绝缘体的相变的WP动力学。<F-centers in alkali halides>我们观察到WP动力学的F-中心。我们发现了一个不对称的光谱和不等的衰减动力学在高，低能量侧的发光峰。这似乎源于2s和2 p态之间的反交叉引起的大的非谐性。这是一个很好的例子，WP动力学的势能曲线上的交叉，这将有助于了解光致相变的动力学。<Bio-materials>我们首次观察到细胞色素c在水溶液中的超快发光，并将发光峰归属于Q带。结果表明，在300 fs内发生了电子向Fe离子d轨道的非辐射转移。一个长寿命的组件被发现，并分配到一个dissociated甲硫氨酸基团的状态。这些结果澄清了细胞色素c的弛豫动力学，这是不知道由于低发光强度。

<Transition metal complexes> We investigated time resolved luminescence in Pt-Br at low temperature. We have found that the luminescence intensity increases anomalously at the low energy end of the wave packet (WP) oscillation. When the main part of the WP turns back to the high energy end, some part goes opposite direction. By comparing the results with a model calculation, we concluded that the WP splits on the top of the adiabatic potential curve connecting the self-trapped-exciton (STE) and the soliton pair state.We investigated the time resolved luminescence of Pd-Br complexes. We found that the STE state does not exist in this material, in spite of the charge-density-wave (CDW) ground state. The WP propagates to the state lower than the band gap without oscillation. This reflects the WP dynamics representing the phase transformation from Peierls insulator to Mott insulator.<F-centers in alkali halides> We observed the WP dynamics in F-centers. We found an asymmetric spectrum and unequal decay dynamics at high and low energy sides of the luminescence peak. This seems to originate from the large anharmonicity due to anticrossing between the 2s and 2p states. This is a good example of the WP dynamics on the potential curve with a crossing, which will useful for understanding the dynamics of photoinduced phase transitions.<Bio-materials> We observed the untrafast luminescence in aqueous solution of cytochrome c for the first time and assigned a luminescence peak to Q band. The result indicates that the non-radiative transfer of the electron to the d-orbital of Fe ion occurs within 300 fs. A long lifetime component is found and assigned to the state with a dessociated methionine group. These results clarify the relaxation dynamics of cytochrome c, which has not been known due to low luminescence intensity.