アミノ酸水溶液におけるテラヘルツ時間領域全反射減衰分光

抄録

We review the terahertz time domain spectroscopy in biomolecules using ultrashort optical pulses, which allows us to obtain the complex dielectric function of the sample directly. We measured the temperature dependence of terahertz spectra in dry arginine crystals, and discussed unharmonicity in intermolecule interaction. We also demonstrated the time-domain attenuated total reflection measurement in a diluted arginine solution, which is sensitive to small change in refractive index in a strong absorption medium, such as water. By the analysis with considering local field, it is clear that there was intermolecular action between amino acid molecules and water molecules. This technique will open to the field of terahertz spectroscopy in hydrated biomolecules.