高压下激光染料分子的超快能量弛豫过程  

Ultrafast energy relaxation process of laser dye molecules at high pressure

作　　者：刘丙国[1] 贺春元[1] 杨中娟[1] 朱红玉[1] 

机构地区：[1]河南理工大学物理化学学院,河南焦作454000

出　　处：《河南理工大学学报（自然科学版）》2011年第4期497-501,共5页Journal of Henan Polytechnic University（Natural Science）

基　　金：国家自然科学基金资助项目(10974069);河南理工大学博士基金资助项目(648443;648428)

摘　　要：将金刚石对顶砧高压技术与飞秒时间分辨光谱测量技术结合起来,研究了压力对染料LDS698受激分子超快能量弛豫过程的影响.实验结果表明,当压力超过3.0 GPa时,样品溶液发生固化,在不同的样品状态下,压力对受激分子能量弛豫过程的影响不同.当压力低于3.0 GPa时,压力对分子内和分子间的能量弛豫过程均有显著的影响;当压力高于3.0GPa时,分子内的能量弛豫过程受压力的影响可以忽略不计,而分子间的能量弛豫过程随压力的变化仍然比较显著.利用相应的理论模型,对实验结果进行解释,由此证明压力能够影响分子的能带结构、分子间的相互作用以及分子跟周围溶液的热传导过程.The ultrafast molecular energy relaxation dynamic processes of LDS698 molecules at high pressure were studied by using the technique combined femtosecond time-resolved spectral measurement with high pressure generation.The results indicated that the LDS698 solution solidified at about 3.0 GPa.The pressure effects on the energy relaxation of the excited molecules are different.When the pressure is lower than 3.0 GPa,the pressure effects on the intra-and inter-molecular energy relaxation are all significant;and when the pressure is higher than 3.0 GPa,the pressure effect on the intra-molecular energy relaxation can be neglected,but the effect on the intermolecular relaxation is also significant.Using the theories suggested the pressure effects on the ultrafast energy relaxation are satisfactorily interpreted.The results also indicated that pressure could influence on the molecular energy gaps,the intermolecular interaction,and the solution thermal conduction.

关 键 词：高压 满足染料 飞秒时间分辨光谱 超快能量弛豫 

分 类 号：O521.21[理学—高压高温物理]