Lasers, LEDs and light sources articles within Nature

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  • Analysis
    | Open Access

    Efficiency roll-off in a wide range of TADF OLEDs is analysed and a figure of merit proposed for materials design to improve efficiency at high brightness, potentially expanding the range of applications of TADF materials.

    • S. Diesing
    • , L. Zhang
    •  & I. D. W. Samuel

  • Article |

    Free-running stable optical dissipative solitons, called Nozaki–Bekki solitons, are created in a ring semiconductor laser; their spontaneous formation with tuning of laser bias eliminates the need for an external optical pump.

    • Nikola Opačak
    • , Dmitry Kazakov
    •  & Benedikt Schwarz

  • Article
    | Open Access

    An electrically driven organic semiconductor laser is achieved by integrating a device structure that efficiently couples an organic light-emitting diode, with extremely high internal-light generation, with a polymer distributed feedback laser.

    • Kou Yoshida
    • , Junyi Gong
    •  & Ifor D. W. Samuel

  • Article
    | Open Access

    Resonant X-ray excitation of the  45Sc nuclear isomeric state was achieved by irradiation of a Sc-metal foil with 12.4-keV photon pulses from a state-of-the-art X-ray free-electron laser, allowing a high-precision determination of the transition energy.

    • Yuri Shvyd’ko
    • , Ralf Röhlsberger
    •  & Tomasz Kolodziej

  • Article |

    Lead-free perovskite light-emitting diodes (LEDs) prepared using tautomeric mixture coordination provide improved ordering in the crystal structure, reduced recombination and enhanced exciton binding energy compared with lead-containing perovskite-based LEDs.

    • Dongyuan Han
    • , Jie Wang
    •  & Ning Wang

  • Article |

    A MicroLED lighting panel, assembled in 60 s by a surface-tension-driven fluidic self-assembly technique, gave a yield as high as 99.90% through the addition of a small amount of poloxamer to the assembly solution.

    • Daewon Lee
    • , Seongkyu Cho
    •  & Sunghoon Kwon

  • Article
    | Open Access

    We developed large-scale photonic-crystal surface-emitting lasers with controlled Hermitian and non-Hermitian couplings inside the photonic crystal and a pre-installed spatial distribution of the lattice constant, which leads to the realization of a continuous-wave brightness of 1 GW cm−2 sr−1.

    • Masahiro Yoshida
    • , Shumpei Katsuno
    •  & Susumu Noda

  • Article
    | Open Access

    Colloidal quantum dot devices demonstrating electrically pumped amplified spontaneous emission are described, showing strong, broadband optical gain and bright edge emission, opening the path to solution-processable laser diodes.

    • Namyoung Ahn
    • , Clément Livache
    •  & Victor I. Klimov

  • Article |

    A new transfer method for microLEDs fabrication based on fluidic self-assembly technology combining magnetic and dielectrophoresis forces is described, achieving a very high simultaneous RGB LED transfer yield and over large areas.

    • Wonjae Chang
    • , Jungsub Kim
    •  & Jeong Soo Lee

  • Article |

    Perovskite LEDs with exceptional performance at high brightness are demonstrated achieving an operational half-lifetime of 32 hours, an important step towards commercialization opening up new opportunities beyond conventional LED technologies, such as perovskite electrically pumped lasers.

    • Yuqi Sun
    • , Lishuang Ge
    •  & Neil C. Greenham

  • Article
    | Open Access

    A frequency-tunable laser based on a hybrid silicon nitride and lithium niobate integrated photonic platform has a fast tuning rate and could be used for optical ranging applications.

    • Viacheslav Snigirev
    • , Annina Riedhauser
    •  & Tobias J. Kippenberg

  • Article |

    We report full-colour, vertically stacked µLEDs that achieve exceptionally high array density (5,100 pixels per inch) and small size (4 µm) via a 2D material-based layer transfer technique, allowing the creation of full-colour µLED displays for augmented and virtual reality.

    • Jiho Shin
    • , Hyunseok Kim
    •  & Jeehwan Kim

  • Article |

    Ultrasmall monodisperse perovskite quantum dots are synthesized in situ on a substrate via ligand structure regulation, yielding the highest external quantum efficiency blue perovskite LEDs reported so far.

    • Yuanzhi Jiang
    • , Changjiu Sun
    •  & Mingjian Yuan

  • Article
    | Open Access

    A fluorescent molecule is described that does not follow Hund’s rule and instead shows singlet and triplet excited states with inverted energy levels, leading to high-efficiency OLEDs with potential implications for optoelectronic devices.

    • Naoya Aizawa
    • , Yong-Jin Pu
    •  & Daigo Miyajima

  • Article
    | Open Access

    Rabi dynamics between the ground state and an excited state in helium atoms are generated using femtosecond extreme-ultraviolet pulses from a seeded free-electron laser, which may allow ultrafast manipulation of coherent processes at short wavelengths.

    • Saikat Nandi
    • , Edvin Olofsson
    •  & Jan Marcus Dahlström

  • Article |

    Using a sol–gel passivation method, the fabrication of blue InGaN nanorod-LEDs with the highest external quantum efficiency value ever reported for LEDs in the nanoscale is demonstrated.

    • Mihyang Sheen
    • , Yunhyuk Ko
    •  & Changhee Lee

  • Article |

    Using a compact, particle-beam-driven plasma-based accelerator to accelerate high-quality electron beams that are completely characterized in the six-dimensional phase space, free-electron lasing  is observed with narrow-band amplified radiation in the infrared range.

    • R. Pompili
    • , D. Alesini
    •  & M. Ferrario

  • Article |

    A material design strategy and fabrication process is described to produce all-polymer light-emitting diodes with high brightness, current efficiency and good mechanical stability, with applications in skin electronics and human–machine interfaces.

    • Zhitao Zhang
    • , Weichen Wang
    •  & Zhenan Bao

  • Article |

    A large electronic display textile that is flexible, breathable and withstands repeated machine-washing is integrated with a keyboard and power supply to create a wearable, durable communication tool.

    • Xiang Shi
    • , Yong Zuo
    •  & Huisheng Peng

  • Article |

    The binding of multidentate ligands to the surface of lead halide perovskite nanocrystals suppresses the formation of surface defects that result in halide segregation, yielding materials with efficient and colour-stable red emission.

    • Yasser Hassan
    • , Jong Hyun Park
    •  & Henry J. Snaith

  • Article |

    Cadmium-free blue quantum dot light-emitting diodes are constructed with a quantum yield of unity, an efficiency at the theoretical limit, high brightness and long operational lifetime.

    • Taehyung Kim
    • , Kwang-Hee Kim
    •  & Eunjoo Jang

  • Article |

    Wave destabilization is demonstrated in semiconductor ring lasers operating at low pumping levels, where ultrafast gain recovery leads to the emergence of a frequency comb regime owing to phase turbulence.

    • Marco Piccardo
    • , Benedikt Schwarz
    •  & Federico Capasso

  • Article |

    A method of engineering efficient and stable InP/ZnSe/ZnS quantum dot light-emitting diodes (QD-LEDs) has improved their performance to the level of state-of-the-art cadmium-containing QD-LEDs, removing the problem of the toxicity of cadmium in large-panel displays.

    • Yu-Ho Won
    • , Oul Cho
    •  & Eunjoo Jang

  • Letter |

    Room-temperature modulation frequencies exceeding 200 GHz are demonstrated in birefringent semiconductor spin-lasers by coupling the spin of the charge carriers to the light polarization.

    • Markus Lindemann
    • , Gaofeng Xu
    •  & Nils C. Gerhardt

  • Letter |

    Organic light-emitting devices containing radical emitters can achieve an efficiency of 27 per cent at deep-red and infrared wavelengths based on the excitation of spin doublets, rather than singlet or triplet states.

    • Xin Ai
    • , Emrys W. Evans
    •  & Feng Li

  • Perspective |

    This Perspective discusses developments in LED-based solid-state lighting for physiological and agricultural applications, and the anticipated benefits in terms of health and productivity.

    • P. M. Pattison
    • , J. Y. Tsao
    •  & B. Bugbee

  • Letter |

    Integrating an optical Kerr frequency comb source with an electronically excited laser pump produces a battery-powered comb generator that does not require external lasers, moveable optics or laboratory set-ups.

    • Brian Stern
    • , Xingchen Ji
    •  & Michal Lipson

  • Letter |

    A scalable thermal drawing process is used to integrate light-emitting and photodetecting diodes into textile-ready polymer fibres, which can be woven into fabrics with possible optical communication and health monitoring applications.

    • Michael Rein
    • , Valentine Dominique Favrod
    •  & Yoel Fink

  • Letter |

    An optical-frequency synthesizer based on stabilized frequency combs has been developed utilizing chip-scale devices as key components, in a move towards using integrated photonics technology for ultrafast science and metrology.

    • Daryl T. Spencer
    • , Tara Drake
    •  & Scott B. Papp

  • Letter |

    A blend of two organic molecules excited by a simple LED light source can release the stored excitation energy slowly as ‘long persistent luminescence’ over periods of up to an hour.

    • Ryota Kabe
    •  & Chihaya Adachi

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