Advanced mmWave and Terahertz communication technologies

Yixiong Zhao and co-authors present a passive refractive index sensor based on the sub-terahertz photonic crystal resonator. It serves as a non-electronic, compact, and low-cost solution for distributed remote sensing, applicable in monitoring airborne pathogens for pre-infection detection.

Hichem Guerboukha and colleagues present a reliable high-data-rate THz communications system when the line of sight between the transmitter and receiver is blocked. They design the near-field wavefront to generate a curved trajectory.

Innem Reddy and colleagues experimentally showcase data communications at speeds of up to 40 gigabits per second at terahertz frequencies with Bessel beams and validate their self-healing nature using a physical obstacle. The results suggest Bessel beams could be used for THz near-field communications, especially when mitigating the effects of blockages.

The authors report implementing and demonstrating a first general-purpose integrated photonic programmable processor capable of performing all the functionalities required in RF photonic systems, such as those needed in 5/6 G communications networks.

Hichem Guerboukha and colleagues describe a conformal (or curved) leaky waveguide in the THz range for antenna applications in wireless communications. The authors describe rich wave behavior at THz frequencies. They also experimentally show application potential for their antennas as multi-beam high-gain transmitters of wireless links with low bit error rates.

Authors present an adaptive underwater optical communication (UWOC) technology based on multi-wavelength lasers and a full-color metasurface for converting visible-band Gaussian to circular autofocusing Airy beams. The potential of Airy beams to mitigate optical power degradation is demonstrated, enabling stable data rate transmission via 4 K video transmission for these systems.