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Development of a Versitile Spectrometer for Light Scattering Spectroscopy

光散射光谱多功能光谱仪的开发

基本信息

批准号：
02559001
负责人：
INOUE Kuon
金额：
$ 4.67万
依托单位：
Hokkaido University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research (B)
财政年份：
1990
资助国家：
日本
起止时间：
1990 至 1991
项目状态：
已结题

项目摘要

A few Raman spectrometers for a combined use with an optical multichannel detector are now commercially available. However, those are inevitably composed of three stages of monochromator, and thereby, are not suited to such Raman spectroscopies as higher sensitivity is needed. Consequently, development of a highly sensitive system is strongly welcome to many scientists and technicians in wide fields.We have for the first time developed a new-type of Raman spectrometer with a new design principle adopted ; first, the system should be much more sensitive as compared to the established ones, and second, the system can be utilized, if necessary, as a single-stage spectrometer with all optical setup left unchanged including a sample. The latter enables one to employ the system for versatile purpose or use. A trial manufacture is such that the premonochromator is composed of two concave gratings making F-number greatly reduced, and further is equipped with a bypass mechanism so as to send directly input light, if necessary, to a main spectrograph. The latter works very well for observing Raman signals with high freqency shift.The characteristics of the system were examined in detail by observing Raman signals of electronic origin as well as phonons in high-T_c superconductors. As a result, the trial system has been proved very satisfying. We have already published an important article concerning superconducting gap excitation observed with the present system, and are submitting an article concerning the system itself.By way of trial experiment, a newly designed Raman spectrometer is now available by purchase from Ritsu Oyo-Kogaku Co. Ltd., together with another simple version as an option.

几种与光学多通道探测器结合使用的拉曼光谱仪现已商业化。然而，这些不可避免地由三个阶段的单色器组成，因此，不适合这样的拉曼光谱，因为需要更高的灵敏度。因此，开发一种高度敏感的系统受到广大领域的许多科学家和技术人员的热烈欢迎。我们首次研制出采用全新设计原理的新型拉曼光谱仪；首先，与现有的系统相比，该系统的灵敏度要高得多；其次，如果需要，该系统可以用作单级光谱仪，所有光学装置都保持不变，包括样品。后者使人们能够将该系统用于多种目的或用途。试制的前单色仪由两个凹形光栅组成，使f值大大降低，并进一步配备旁路机构，以便在必要时将直接输入的光发送到主摄谱仪。后者对于观察高频移的拉曼信号效果很好。通过观察高t_c超导体中的电子源拉曼信号和声子，对该系统的特性进行了详细的研究。结果证明，该审判制度非常令人满意。我们已经发表了一篇关于用现有系统观察到的超导间隙激发的重要文章，并且正在提交一篇关于系统本身的文章。通过试验，新设计的拉曼光谱仪现在可以从Ritsu Oyo-Kogaku株式会社购买，同时还有另一个简单的版本作为选择。