Filling the Terahertz Gap

The range of the electromagnetic spectrum between 0.1 and 10 THz is often referred to as the terahertz gap, owing to a substantial lack of sources and detectors. Standard electronic approaches do not work effectively at such high frequencies, while optical ones also fail at such long wavelengths. This region of the spectrum is therefore open to fundamental research as well as technical challenges. We shall present our recent journey into the terahertz spectral region and our results in the quest of closing the THz gap. The main idea that motivates our research is that long wavelengths are best suited for driving the motion of the electrons. This general concept will play a major role both in terms of applications of terahertz photonics and for enhancing the terahertz generation itself. Topics like THz generation from plasma, THz imaging, broadband THz detection, THz enhanced spectroscopy and thermometry will be tackled.