多色强激光场与分子耦合制备长寿命局域模振动

讨论用多色激光场与分子耦合来抑制局域模波包的扩散，从而将能量长时间锁定在单一化学键上以便实现选键化学的可能性．用全量子理论和半经典理论分别建立了分子振动在弱激光场和强激光场中激发和演化的模型．结果表明，多色弱场无法将布居数囚禁在局域模波包上．在强场作用下，利用强激光产生的功率加宽和波包之间的干涉，有可能将布居数囚禁在基态和局域模振动态之间关键词：

MAKING LOCAL MODE VIBRATION LONG LIVED BY THE INTERACTION BETWEEN A STRONG MULTI-COLOR LASER FIELD AND MOLECULES

Trapping vibrational energy into one single bond is a key problem of bond-selective chemistry. We explored this possibility by means of restricting local mode wavepacket dephasing with multi-color laser field. The vibrational excitation and evolution of molecules in weak and strong multi-color laser fields are discussed by field-quantization method and semi-classical method. The results demonstrate that population can not be trapped in a local mode wave-packet using multi-color weak field, while it is possible to trap vibrational population between the ground state and local mode vibration by making use of power-broadening induced by strong laser field and the interference between two wave-packets excited by two strong laser of different frequencies.