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A Laser that Can Fire Light Pulses in One Billionth of a Second Is Set to Produce Structures 1000 Times...

Japanese researchers have demonstrated a femtosecond‑laser technique that patterns silicon and silica films with periodic nanoscale grooves, directly controlling phonon pathways. By matching groove spacing to phonon mean free paths, the method reduces thermal conductivity while delivering structures up to a thousand times stronger than conventional patterns. The process operates over a thousand times faster than electron‑beam lithography, is mask‑less, resist‑free, and fits existing CMOS workflows. Potential applications span high‑performance computing, quantum hardware, and AI‑chip cooling.