Development of a High-Resolution Spectrometer in the THz Region Based on Difference Frequency Generation of Two Infrared Lasers

基于两个红外激光器差频产生的太赫兹区域高分辨率光谱仪的研制

• 批准号: 12640389
• 负责人: ODASHIMA Hitoshi
• 金额: $ 0.45万
• 依托单位: Toyama University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12640389/
• 关键词: MIM diode; terahertz radiation; far-infrared radiation; difference frequency generation; molecular spectroscopy; アンモニアレーザー

(1) Generation of Terahertz Radiation Based on Difference Frequency between ^<15>NH_3 and CO_2 Lasers:We have constructed a CO_2 laser to generate terahertz radiation and stabilized its frequency. We tried to improve a ^<15>NH_3 laser in power in order to provide a higher difference frequency.(2) Prediction of Transition Frequencies of Molecule in the THz Region:Rotational transitions of XeH^+ have been observed in the 1-5 THz region with a TuFIR spectrometer based on difference frequency of two CO_2 lasers. Determined molecular parameters enabled us to predict frequencies of rotational transitions over 6 THz.The microwave spectrum of methyl formate (HCOOCH_3) has been observed to determine molecular parameters such as potential barrier height of the methyl torsion.

(1)利用差频产生太赫兹辐射：我们研制了一台产生太赫兹辐射的CO_2激光器，并对其频率进行了稳定。(2)分子太赫兹跃迁频率的预测：基于两个CO_2激光器的差频，用TuFIR光谱仪观测到了XeH~(++)在1-5太赫兹范围内的转动跃迁。已确定的分子参数使我们能够预测6 THz以上的转动跃迁频率。观察到甲酸甲酯(HCOOCH3)的微波光谱，以确定分子参数，如甲基扭转势垒高度。

项目成果

Yoshifumi Karakawa: "The Microwave Spectrum of Methyl Formate(HCOOCH_3) in the Frequency Range from 7 to 200 GHz"Journal of Molecular Spectroscopy. 210. 196-212 (2001)

Yoshifumi Karakawa：“频率范围为 7 至 200 GHz 的甲酸甲酯 (HCOOCH_3) 的微波光谱”分子光谱学杂志。

Yoshifumi karakawa: "The Microwave Spectrum of Methyl Formate (HCOOH_3) in the Freguency Range from 7 to 200 GHZ"Journal of Molecular Spectroscopy. 210. 196-212 (2001)

Yoshifumi karakawa：“频率范围为 7 至 200 GHZ 的甲酸甲酯 (HCOOH_3) 的微波光谱”分子光谱学杂志。

Y. Ohtaki: "Rotational Spectra of XeH^+ and Its Isotopic Species"Journal of Molecular Spectroscopy. 210. 271-274 (2001)

Y. Ohtaki：“XeH^ 及其同位素种类的旋转光谱”分子光谱学杂志。

F. Matsushima: "High Resolution Molecular Spectroscopy Using a Tunable Far-Infrared Light Source"Butsuri. 57 (3). 180-187 (2002)

F. Matsushima：“使用可调谐远红外光源的高分辨率分子光谱”Butsuri。

Yuichiro Ohtaki: "Rotational Spectra of XeH^+ and Its Isotopic Species"Journal of Molecular Spectroscopy. 210. 271-274 (2001)

Yuichiro Ohtaki：“XeH^ 及其同位素种类的旋转光谱”分子光谱学杂志。