Terahertz biophotonics using local-field enhancement

为了实现生物组织的灵敏太赫兹光谱，研究了利用全反射和表面等离子体共振的新型太赫兹谐振器。通过对该器件在水环境下的时域有限差分（FDTD）仿真，阐明了太赫兹波的局域增强特性。采用新型工艺，用有机材料（SU-8）成功制备了高质量的不同周期的太赫兹波谐振器。此外，还实现了宽可调谐的大功率太赫兹波源和活细胞原位光谱测量系统。

Novel terahertz resonators using total reflection and surface-plasmon resonances were studied, in order to achieve sensitive terahertz spectroscopy of biological tissue. Local-field enhancement of terahertz wave was clarified by finite difference time domain (FDTD) simulation of the devices under aqueous environment. High-quality terahertz-wave resonators with various periods were successfully fabricated by using novel process with an organic material (SU-8). Furthermore, widely tunable high-power terahertz wave sources and in situ spectroscopic measurement system of live cell were realized.