Lithography-free photonic chip offers speed and accuracy for artificial intelligence

https://phys.org/news/2023-05-lithography-free-photonic-chip-accuracy-artificial.html

"spatially distributed optical gain and loss. Lasers cast light directly on a semiconductor wafer, without the need for defined lithographic pathways... without lithography adaptable, patterns not pre-defined and etched in intrinsically defect free... build and use quickly, integrate, reprogram laser patterns on the fly to achieve real-time reconfigurable computing for on-chip training AI network"

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