Terahertz systems have a new capacity to manipulate light.

"Researchers have created a new method to generate structured terahertz light beams using programmable spintronic emitters, marking a significant advancement in terahertz technology. This innovation allows for the generation and precise manipulation of light with both spin and orbital angular momentum."(ScitechDaily, Terahertz Breakthrough: New Technique Offers Unprecedented Control Over Light)

"The technology has potential applications in security, medical imaging, and communication. This development overcomes previous challenges in generating and controlling terahertz light, paving the way for novel devices with enhanced capabilities. Credit: SciTechDaily.com" (ScitechDaily, Terahertz Breakthrough: New Technique Offers Unprecedented Control Over Light)

New terahertz systems use spintronics to create radiation. The system uses spintronic-based programmable spintronics. And those spintronics have an important role in the new terahertz systems that can open paths to new communication and photonics control. 

The system where photons are trapped in the terahertz radiation can be incredibly multi-used. Researchers can use that thing for making new sensors and new communication tools. 

Terahertz radiation can make channels that can used to manipulate photons. That thing can used in the new photon-based neural networks, that can sense electromagnetic and even gravity waves with new accuracy. Those systems can make it possible to collect data about gravity waves and their interaction with other radiation types. 

"(a) Schematic diagram of the experimental setup. (b) Schematics of the laser-assisted-magnetic-programming method. Credit: Shunjia Wang, Wentao Qin, Tongyang Guan, Jingyu Liu, Qingnan Cai, Sheng Zhang, Lei Zhou, Yan Zhang, Yizheng Wu, Zhensheng Tao" (ScitechDaily, Terahertz Breakthrough: New Technique Offers Unprecedented Control Over Light)

Teraherz-radiation is one possibility for the new communication lines. Those kinds of things are important for the 6G and faster communication. The terahertz radiation allows to make more channels for the 6G communication. 

That thing makes it a very interesting tool is that the terahertz radiation goes through the walls. That makes this thing a very promising alternative to laser communication. The laser ray will not normally travel through walls. And that limits its use in the wireless network. 

"UAB researchers have developed an innovative switch for 6G communications that doubles performance to 120 GHz and reduces energy use, promising enhanced sustainability and efficiency in telecommunications." (ScitechDaily, High-Frequency, Low-Power: Researchers Develop Switch To Revolutionize 6G Communications). It's possible. The 6G network can also use terahertz frequencies. Terahertz frequencies involve more frequencies and more space in that network. 

Coherent terahertz or terahertz masers can offer safe and effective communication tools. They can be the new tools for communication in highly populated areas. Terahertz masers can send their data in a coherent package. If the eavesdropper cannot put the antenna in the Terahertz radiation that makes communication safer, because the eavesdropper must precisely know, where the message travels. 

Coherent terahertz radiation allows to send multiple messages in the same way as lasers. The messages travel like laser beams, but terahertz radiation uses different frequencies. That means the coherent terahertz radiation can also offer to use bandwidth more effectively than in non-coherent communication. In terahertz technology, the system can send more data if it uses coherent terahertz-based data transport. 

https://scitechdaily.com/terahertz-breakthrough-new-technique-offers-unprecedented-control-over-light/