High-speed optical modulators based on silicon, quantum cascade detectors, a photothermal phase-contrast microscope and spin light-emitting diodes with low threshold current density were highlights of the Japan Society of Applied Physics Spring Meeting.
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Horiuchi, N. Infrared applications. Nat. Photonics 13, 376–377 (2019). https://doi.org/10.1038/s41566-019-0446-y
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DOI: https://doi.org/10.1038/s41566-019-0446-y