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    "headline": "A Shorter Pulse Climbed Higher Before Coherence Broke",
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    "dek": "Changing pulse duration and intensity selected different electron pathways and extended extreme-ultraviolet emission in an insulator.",
    "summary": "Changing pulse duration and intensity selected different electron pathways and extended extreme-ultraviolet emission in an insulator.",
    "body_text": "Experiments tuned laser pulses from 5 to 29 femtoseconds and intensities from 0.8 to 74 terawatts per square centimeter. Moderate many-cycle pulses accumulated carriers across cycles, while few-cycle pulses near 22 terawatts per square centimeter drove subcycle multiband motion reaching 25 to 50 electron-volt photons before decoherence suppressed emission. The result is a materials-and-optics control study, not a finished light source.",
    "why_it_matters": "Changing pulse duration and intensity selected different electron pathways and extended extreme-ultraviolet emission in an insulator.",
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      "The result is a materials-and-optics control study, not a finished light source."
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    "tags": [
      "high harmonics",
      "ultrafast optics",
      "insulators"
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      "title": "arXiv preprint 2608.06129",
      "publisher": "arXiv",
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    "title": "A Shorter Pulse Climbed Higher Before Coherence Broke",
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