We demonstrate pulsed THz emission and detection in low temperature (LT) MBE grown Be-doped InGaAs/InAlAs multi-nanolayer structures for an excitation wavelength of 1030 nm. We obtained spectra with a bandwidth of up to 3 THz. Furthermore, we performed differential transmission experiments to investigate the material's relaxation time constants.

We present terahertz lenses made of polymeric compounds which provide a better focusing capability and an increased functionality than state of the art lenses made of pure base polymers. This is achieved by employing mixtures between polypropylene and alumina as well as polypropylene and zinc sulfide which allows for a significant increase of the refractive index of the lens base material.

We present terahertz (THz) lenses made of highly refracting polymeric compounds which provide a better focusing performance and an increased functionality in comparison to conventional THz lenses. Using mixtures consisting of polypropylene (PP) and alumina as well as PP and zinc sulfide allows a significant increase of the refractive index while simultaneously keeping a low extinction and dispersion. With these new material combinations, lenses with an increased focusing capability are realized. This is evaluated by focal plane measurements using a fiber coupled THz time-domain spectrometer.

Recently, we have shown that a considerable increase in image acquisition speed can be achieved by employing a dedicated grating/lens system, converting spectral into spatial resolution. Here, we present first results of spectrum to space computed THz tomography, using this novel imaging approach.

We present first results of pulsed THz emission from low temperature (LT) MBE grown Be-doped InGaAs/InAlAs multi-nanolayer structures at an excitation wavelength of 1030 nm. The spectra obtained reach 3 THz. We further investigate the material's relaxation time constants by differential transmission experiments.