Abstract
The optics and one of applications of the terahertz synchrotron radiation are introduced. The ideal optics for collecting bending-magnet radiation, namely three-dimensional “magic mirror”, is employed at two Japanese infrared/terahertz (IR/THz) beam lines, one is at UVSOR-II and the other at SPring-8. The brilliance at the beam line at UVSOR-II is one order and two —four orders of magnitude higher than conventional light sources in the middle-IR and THz regions, respectively. The very high brilliant THz light is useful for the THz spectroscopy at high pressures realized in a diamond anvil cell.
