We report on a high-sensitive THz plasmonic-enhanced photoconductive antenna (PCA)-detector based on an InGaAs/InAlAs superlattice heterostructure. A noticeable increase in the sensitivity and signal-to-noise ratio of the proposed PCA-detector is shown compared to a similar detector without plasmonic electrodes. The efficiency of plasmonic electrodes has been experimentally confirmed via pulsed THz time-domain spectroscopy by measuring the dependence of the THz amplitude of the detector’s signal on the polarization of laser excitation.

The parameters of the generated terahertz radiation in a two-dimensional WSe2 film grown by chemical vapor deposition were investigated for the first time. The main mechanism of the generated terahertz radiation in the studied sample was determined. The terahertz amplitude dependence on azimuthal angle in the two-dimensional WSe2 film was studied. The distribution of the laser pump electric field in the WSe2 / SiO2 / Si structure was calculated as a function of the silicon dioxide thickness. The choice of the optimal structural geometry for the effective generation of terahertz radiation by a monolayer WSe2 was theoretically justified