Nearfield magnetic effect of THz pulses and magnetic THz imaging

为了实现高灵敏度和高空间分辨率，我们研究了利用近场效应的THz时域光谱系统的研制。我们使用磁性材料作为样品和/或近场扫描尖端。 我们开发了近场成像系统，使用金属或磁性材料（钡铁氧体）扫描尖端。 我们在磁性材料（ErFeO_3）表面制作了金属开口环共振器，成功地观测到了大振幅的相干自旋旋进运动。我们得到了自旋系统与开口环共振器相互作用的结果。

We studied development of the THz time domain spectroscopy system using near field effect for high sensibility and high space resolution. We used magnetic materials as a sample and/or near field scanning tips. We developed the near field imaging system using metal or magnetic material (Ba ferrite) scanning tips. We succeeded the observation of the coherent spin precession motion with the large amplitude by making metal split ring resonators on surface of magnetic material (ErFeO3). We obtained the results of the interaction between the spin system and the split ring resonators.