Intense laser fields can rip electrons from an atom and slam them back into it. By using intense terahertz radiation, this idea can be extended to electrons paired with 'holes' in a semiconductor. See Letter p.580
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Huber, R. Terahertz collisions. Nature 483, 545–546 (2012). https://doi.org/10.1038/483545a
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DOI: https://doi.org/10.1038/483545a
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