infrared millimeter terahertz waves scientific conferences

We report on the improvement of the optical performance of THz detectors based on antenna-integrated Si CMOS FET when cooled with liquid nitrogen. The minimum optical noise-equivalent power (NEP) at 77 K is as low as 11.7 pW/Hz at 0.6 THz, which corresponds to a decrease by a factor of 3.8 compared to room temperature, and approaching the optical sensitivity levels of commercial helium-cooled bolometers. The channel’s resistance, optical responsivity and NEP measurements reveal a specific feature for this family of detectors, putting forward a gate biasing regime for which the performance can be maintained almost independent of the temperature.