https://phys.org/news/2019-07-nanoantennas-ultra-fast-wireless.html Current chips are basically baked crystals that ring like a bell when you push enough current through them, and they can work faster if you can keep them cool. Plasmonic chips don't move current like our electronics do, but use a static electromagnetic field to send signals at a good fraction of the speed of light. These guys figured out a cheap way to make them work, making it cheap to translate super fast optical signals into electronic signals and vice versa. This is among the last pieces required to integrate optical fibers and circuitry into anything imaginable, including quantum networks and terahertz networking.