High-sensitivity terahertz detection by 2D plasmons in transistors

"Gate-readout and a 3D rectification effect for giant responsivity enhancement of asymmetric dual-grating-gate plasmonic terahertz detectors" (2023) https://www.degruyter.com/document/doi/10.1515/nanoph-2023-0... :

> [...] 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. [...]

"Metasurface antenna to manipulate all fundamental characteristics of EM waves" (2023) https://news.ycombinator.com/item?id=38658967 :

> "Electrons turn piece of wire into laser-like light source" (2023) https://news.ycombinator.com/item?id=33490730 :

> "Coherent Surface Plasmon Polariton Amplification via Free Electron Pumping" (2023) https://doi.org/10.21203/rs.3.rs-1572967/v1

^^ FWIU this transmits laser and Thz wavelengths?