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"

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Optical synapses/ photonic brain: low-power, integrated photonic neural networks
https://www.eurekalert.org/news-releases/1115494

Fieldoscopy reveals femtosecond optical switching in 15 nm indium tin oxide nanocrystals
https://phys.org/news/2026-03-fieldoscopy-reveals-femtosecond-optical-nm.html