Application of Titanium-based Microbolometers in Terahertz Time-Domain Spectrometers

Titanium-based antenna coupled microbolometers (Ti-μbolometers) were applied for a spatial mode control of terahertz time-domain spectroscopy (THz-TDS) systems. The response spectra of Ti-μbolometers with three different antenna designs – narrow-band dipole antenna for 0.3 THz, 0.7 THz and a log-periodic antenna for a wide-band detection – were investigated. The spatial profiles of focused and unfocused beams were recorded. It was shown that the Ti-μbolometers can serve as useful instruments in optical alignment and monitoring of spatial mode features in THz-TDS system.