> [...] An antenna connected to the source and gate electrodes of a single-gate-type of these transistors feeds AC THz voltage between them, resulting in excitation of 2D plasmons in their channels and generation of rectified photocurrent by their hydrodynamic nonlinearities [11, 12]. Alternatively, we have developed the so-called grating-gate transistors [12–17] as a type of plasmonic THz detectors. The grating-gate structure serves as a deep-subwavelength coupler that enables direct, efficient, broadband conversion from the incident THz waves to the 2D plasmons, rather than a coupling through an integrated antenna as in the single-gate transistors. [...]
> [...] An antenna connected to the source and gate electrodes of a single-gate-type of these transistors feeds AC THz voltage between them, resulting in excitation of 2D plasmons in their channels and generation of rectified photocurrent by their hydrodynamic nonlinearities [11, 12]. Alternatively, we have developed the so-called grating-gate transistors [12–17] as a type of plasmonic THz detectors. The grating-gate structure serves as a deep-subwavelength coupler that enables direct, efficient, broadband conversion from the incident THz waves to the 2D plasmons, rather than a coupling through an integrated antenna as in the single-gate transistors. [...]