Predissociation dynamics studied by degenerate four wave mixing spectroscopy

简并四波混合光谱研究预解离动力学

• 批准号: 07640697
• 负责人: TSUKIYAMA Koichi
• 金额: $ 0.38万
• 依托单位: Science University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07640697/
• 关键词: Four wave mixing; Amplified spontaneous emission; Predissociation; Rydberg state; Nitric oxide; パラメトリック四波混合; Kr; NO

When then laser frequency was tuned through the C-X two-photon transition of NO molecules, near-IR and UV radiation were emitted along the laser propagation direction within a narrow solid angle. It was shown that the UV wave was generated by the parametric four wave mixing (PFWM) process. Excitation spectra for the C-X band exhibited an excellent S/N ratio, implying that PFWM might be utilized as a novel spectroscopic method which can interrogate the two-photon resonant levels.Amplified spontaneous emission (ASE) from single rotational levels of several Rydberg states of NO has been investigated. The UV laser is fixed to a specific rotational component of the A state. When the second laser was introduced collinearly and the frequency was resonant to the transitions fromthe A state to the higher Rydberg members, the highly directional ASE in the near IR region was found to be generated along the excitation laser beams. Dispersed ASE spectra revealed the cascading radiative decay from the initially populated level down to the A state. It was demonstrated that ASE competes with weak predissociation.

然后通过NO分子的C-X双光子跃迁调谐激光频率，在狭窄的立体角内沿激光传播方向发射近红外和紫外辐射。结果表明，紫外波是由参数四波混频（PFWM）过程产生的。C-X波段的激发光谱显示出良好的信噪比，这意味着PFWM可以作为一种新的光谱方法来询问双光子共振能级。研究了一氧化氮在几个里德堡态的单转动能级上的放大自发辐射（ASE）。紫外激光器固定在a态的特定旋转分量上。当第二激光器共线引入，且频率与从A态到更高里德堡元的跃迁共振时，发现近红外区沿激发激光束产生了高度定向的ASE。分散的ASE光谱显示了从初始填充能级到A态的级联辐射衰减。结果表明，ASE与弱预解相竞争。

项目成果

K.Tsukiyama: "Rotational analyzes of laser induced amplified spontaneous emission (LIASE) in the E^2SIGMA^+ (v=1), D^2SIGMA^+ (v=5), L^2PI (v=2), B^2PI (v=21) and F^2DELTA (v=0) states of NO" J.Phys.Chem.101. 360-365 (1997)

K.Tsukiyama：“E^2SIGMA^ (v=1)、D^2SIGMA^ (v=5)、L^2PI (v=2)、B^2PI 中激光诱导放大自发发射 (LIASE) 的旋转分析

K.Tsukiyama: "Rotational analyses of laser induced amplitied spontaneous emission in the E^2Σ^+ (v=1), and F^2Δ (v=0) states of NO" J.Phys.Chem.101. 360-365 (1997)

K.Tsukiyama：“NO 的 E^2Σ^+ (v=1) 和 F^2Δ (v=0) 状态下激光诱导放大自发发射的旋转分析”J.Phys.Chem.101。 (1997)

K.Tsukiyama: "Parametric four wave mixing in Kr" J.Phys.B. 29. L345-L351 (1996)

K.Tsukiyama：“Kr 中的参数四波混合”J.Phys.B。

J.Ishii, Y,Ogi, Y.Tanaka and K.Tsukiyama: "Observation of the two photon resonant parametric four-wave mixing in the NO C^2PI (v=0) state" Opt.Commun.132. 316-320 (1996)

J.Ishii、Y、Ogi、Y.Tanaka 和 K.Tsukiyama：“NO C^2PI (v=0) 状态下两个光子共振参量四波混合的观察”Opt.Commun.132。

J. Ishii, K, Uehara K. Tsukiyama: "Cascading amplified spontaneous emission of NO Rydberg states" J. Chem. phys.104. 499-508 (1996)

J. Ishii, K, Uehara K. Tsukiyama：“NO Rydberg 态的级联放大自发发射”J. Chem。