THz physics at the Research Center Dresden-Rossendorf: from scalable antennas to free-electron laser based near-field microscopy

I will discuss two quite different activities, (1) novel scalable THz antennas for time-domain spectroscopy and (2) near field microscopy using a free-electron laser.
We have developed photoconductive antennas based on an interdigitated, scalable design, which combines the advantages of large-aperture emitters and usual antennas, yet without their respective drawbacks. I will discuss their use as THz emitters as well as detectors.
In our institute we have an IR/THz free-electron laser. After describing this facility, I will present some results from using this high-power source for near-field imaging of ferroelectric domains in BaTiO3.