The integration of an optically pumped switch in a quantum cascade laser device yields a semiconductor terahertz amplifier that promises to extend the capabilities of time-domain spectroscopy.
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Resonant plasma excitation by single-cycle THz pulses
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Tredicucci, A., Di Carlo, A. An ultrafast amplifier. Nature Photon 3, 681–682 (2009). https://doi.org/10.1038/nphoton.2009.226
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DOI: https://doi.org/10.1038/nphoton.2009.226
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Resonant plasma excitation by single-cycle THz pulses
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