Advanced Application of Laser-Excited Terahertz Waves

激光激发太赫兹波的先进应用

基本信息

批准号：
15106002
负责人：
MASANORI Hangyo
金额：
$ 58.57万
依托单位：
Osaka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (S)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2007
项目状态：
已结题

项目摘要

The aim of this research is to apply the new techniques of terahertz spectroscopy and imaging which the present research group has developed to advanced measurements of materials, and to measurements of new materials and bio specimens, and to establish foundations for broad applications. The following results are obtained.1. As to the development of THz sources, the 50 times enhancement of the radiation power from an InAs surface has been obtained by the attachment of an MgO hemispherical lens. It is found that the polarity of the THz emission waveform is reversed at around 5 T with increasing external magnetic field for n-InAs and, from this result it becomes clear that the conversion of the magnetoplasma modes to the radiation modes outside of the crystal is important in the emission process.2. The THz magnetooptical measurement system has been developed with variable temperature and magnetic field ranges of 5-300 K and ±5T, respectively. It was applied to the measurements of cyclotron resonance of GaAs quantum wells and the magnetooptical effects of InAs and Si-doped GaAs. The THz- time-domain spectroscopic method has been applied to the electron spin resonance (ESR) for the first time.3. Transmission spectra of two-dimensional dielectric sphere photonic crystals have been investigated. It is found that the feature of the band structure changes from the hopping-bike one of the confined modes to the waveguide-mode-like one of a dielectric slab with decreasing the dielectric constant Metal hole arrays with various structures have been investigated. They show a variety of transmission properties and the physical mechanisms of them are clarified.4. Spectra of amino acids, peptide, and proteins, etc. are measured and the characteristics of them are clarified. Especially, it is demonstrated that the protein dynamics can be obtained from the THz spectra.5. The performance of the compact and cheep THz spectrometer using CW multimode laser diodes is enhanced.

这项研究的目的是应用Terahertz光谱和成像的新技术，本研究小组已开发出材料的高级测量，并测量新材料和生物标本，并为广泛应用建立基础。获得以下结果1。至于THZ源的发展，通过MGO半球形透镜的附着获得了INAS表面的辐射功率的50倍。发现随着N-INAS的外部磁场的增加，THZ发射波形的极性在5 t左右逆转，并且从此结果很明显，在发射过程中，磁性肿瘤模式向晶体外的辐射模式的转化很重要。2。 THZ磁性测量系统已开发，温度和磁场范围分别为5-300 K和±5T。它应用于GAAS量子井的回旋共振以及INAS和SI掺杂GAAS的磁效应的测量。 THZ-时间域光谱法首次应用于电子自旋共振（ESR）3。已经研究了二维异态球光子晶体的透射光谱。据研究发现，从跳自行车的一种限制模式变为饮食板中的一种限制模式之一，研究了带有各种结构的饮食恒定金属孔阵列。它们显示了各种传输特性，并阐明了它们的物理机制。4。测量氨基酸，胡椒和蛋白质等的光谱，并阐明其特性。特别是，可以证明可以从THZ光谱获得蛋白质动力学5。使用CW多模激光二极管的紧凑型和廉价THZ光谱仪的性能得到了增强。