Ultrafast optical switching using transient Pauli blocking in indium nitride thin films a potential breakthrough for photonic devices/ AI

https://www.eurekalert.org/news-releases/1117450

"fs laser pulses induce rapid electronic temperature rise... blocking optical absorption, switching material from opaque to transparent on sub-ps timescale... enables switching across wide spectrum from visible to near-IR... occurs even with negligible photoexcited carriers... high-speed computing, enhanced wavelength-division multiplexing by handling multiple laser colors simultaneously, robust route for optical activation functions gating in scalable photonic neural networks, AI"