Lasers, LEDs and light sources articles from across Nature Portfolio

Lasers, LEDs and light sources are devices that create light. LEDs (light emitting diodes) convert an electrical current into light using spontaneous emission in optically active semiconductors. Lasers add a mechanism for optical feedback, such as mirrors, that stimulates further emission and generates a high-intensity beam of radiation.

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News and Comment

  • News & Views |

    Due to dispersion, the group velocity of laser pulses propagating in plasmas slows down with increasing wavelength, which presents challenges for precision-controlled plasma interactions. Now, new techniques for spatio-temporal pulse shaping have lifted this limitation in the demonstration of short-pulse table-top soft X-ray lasers.

    • Sam K. Barber
    Nature Photonics 17, 295-296
  • News & Views |

    The Ti:Sa laser, a workhorse of any optics laboratory, is typically a bench-top system. A hybrid integration approach now enables a low-threshold photonic-circuit-integrated Ti:Sa laser the size of a fingernail.

    • Arnan Mitchell
    •  & Heike Ebendorff-Heidepriem
    Nature Photonics 17, 290-291
  • Comments & Opinion |

    Micro-light-emitting-diode display applications are growing quickly as technology companies begin to use them in a range of products. Key to the development of these applications was the miniaturization of gallium nitride light-emitting diodes. Hongxing Jiang and Jingyu Lin recount how this was achieved.

    • Hongxing Jiang
    •  & Jingyu Lin
  • News & Views |

    By selectively engineering the surface roughness of micro-light-emitting-diode chips, and thus the strength of the van der Waals forces that bond them to a substrate, large-area displays can be created via a fluidic-assisted transfer method.

    • Young Rag Do
    •  & Gang Yeol Yoo
    Nature Electronics 6, 182-183