High resolution terahertz (THz) spectroscopy is a powerful analytical tool for laboratory
purposes as well as for remote sensing in astronomy, planetary research, and Earth …

We present the performance of the upGREAT heterodyne array receivers on the SOFIA
telescope after several years of operations. This instrument is a multi-pixel high resolution …

Terahertz (THz) quantum cascade laser (QCL) is an electrically pumped unipolar photonic
device in which light emission takes place due to electronic transitions between subbands …

The design and the performance of a 4.7-THz local oscillator (LO) for the GREAT (German
REceiver for Astronomy at Terahertz frequencies) heterodyne spectrometer on SOFIA, the …

We report on the observation of an approximately linear reduction in the maximum operating
temperature with an increasing emission frequency for terahertz quantum-cascade lasers …

We report on terahertz (THz) quantum-cascade lasers (QCLs) based on GaAs/AlAs
heterostructures, which exhibit single-mode emission at 3.360, 3.921, and 4.745 THz. These …

We present the first superconducting hot electron bolometer (HEB) waveguide mixer
operating at 4.7 THz. The 5.5-nm-thick, 300-nm-long, and 3600-nm-wide NbN HEB …

We introduce a double metal terahertz quantum cascade laser meant for astrophysical
heterodyne measurements. The laser ridge is embedded in benzocyclobutene, and the …

We have developed terahertz (THz) quantum-cascade lasers (QCLs) based on GaAs/AlAs
heterostructures for application-defined emission frequencies between 3.4 and 5.0 THz. Due …

We have realized GaAs/AlAs quantum-cascade lasers operating at 4.75 THz exhibiting more
than three times higher wall plug efficiencies than GaAs/Al 0.25 Ga 0.75 As lasers with an …