SYSTEMATIC STUDY OF POLARIZATION OF TWO-PHOTON ABSORPTION IN SYMMETRY ASSIGNMENTS

In this paper, we have systematically analyzed the degenerate and nondegenerate two-photon polarization ratios of various point groups. We present the maximum of symmetry assignments of two-photon transition with the combination of degenerate and nondegenerate two-photon absorption. These results provide the theoretical basis for the experimental assignments.     

甲苯酚第一激发态的共振多光子电离谱

测量了间位甲苯酚和甲酚异构体混合物能量在３５１８０－３６００２ｃｍ＾－１范围的双光子共振四光子电离谱。对第一电子激发态振动带做了分析和归属，并对苯分子的不同取代对振动模的影响做了比较和分析。     

微腔激光器速率方程分析

推出了至少有一维尺寸在发射波长量级的微腔激光器的光输出特性，首次得到了无辐射衰减速率不等于零时速率方程的角析解。结果表明，微腔激光器自发发射到腔模的较高的合效率使激发特性和传统的激光器有很大的不同。     

NEW METHOD FOR DETERMINING THREE-PHOTON TRANSITION TENSOR PATTERNS FOR RANDOMLY ORIENTED MOLECULES

The method and results are given for the tensor patterns and polarization ratios of three-photon absorption excited by single-laser for randomly oriented molecules. The ratio of oriented average of transition rate for circularly polarized light to that for linearly polarized light,Ω, can be obtained by the simple three-photon transition tensor. For transition of which the tensor has one independent element, we give the value of polarization ratio; for transition of which the tensor contains two independent elements, we also give the possible range of polarization ratio. These results may be helpful for the symmetry assignment of the excited states.     

吡啶气相分子的共振多光子电离谱

本工作观测了双光子能量在35180-36002cm^-^1范围内吡啶分子的共振多光子电离谱。对电子跃迁S~1(^1B~1)→S~0(^1A~l)的振动带做了归属, 首次在^1B~1态观察到7个新的振动模。讨论了N原子取代对分子结构及振动模的影响。