A laser with a record low energy cost has now been demonstrated by using a laser cavity based on photonic crystals. Shinji Matsuo of NTT Photonics Laboratories in Japan talked to Nature Photonics about its significance.
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Horiuchi, N. A big leap in energy-saving lasers. Nature Photon 7, 576 (2013). https://doi.org/10.1038/nphoton.2013.173
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DOI: https://doi.org/10.1038/nphoton.2013.173
