Ultrafast control of interactions between light/ optical resonators for faster optical computers, quantum communication, and photonic circuits

https://www.eurekalert.org/news-releases/1093668

"could weaken resonance/ slightly shift color, but no on/ off switching... overcome using metasurfaces incorporating sets of 2 silicon nano-rods of different shapes whose optical responses to certain wavelengths of light cancel each other out, structure remaining invisible meaning resonance switched off... exciting 1 nano-rod with ultrafast 200 fs pulse causes resonance to couple with light meaning resonance switched on... can generate resonance, quench it, or adjust bandwidth... not limited to silicon... future: time crystals"