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Conversionless efficient and broadband laser light diffusers for high brightness illumination applications

Author

Listed:
  • Fabian Schütt

    (Kiel University)

  • Maximilian Zapf

    (Friedrich-Schiller-University Jena)

  • Stefano Signetti

    (University of Trento)

  • Julian Strobel

    (Kiel University)

  • Helge Krüger

    (Kiel University)

  • Robert Röder

    (Friedrich-Schiller-University Jena)

  • Jürgen Carstensen

    (Kiel University)

  • Niklas Wolff

    (Kiel University)

  • Janik Marx

    (Hamburg University of Technology)

  • Tian Carey

    (University of Cambridge
    Imperial College London)

  • Marleen Schweichel

    (Kiel University)

  • Maik-Ivo Terasa

    (Kiel University)

  • Leonard Siebert

    (Kiel University)

  • Hyo-Ki Hong

    (Ulsan National Institute of Science and Technology (UNIST))

  • Sören Kaps

    (Kiel University)

  • Bodo Fiedler

    (Hamburg University of Technology)

  • Yogendra Kumar Mishra

    (University of Southern Denmark)

  • Zonghoon Lee

    (Ulsan National Institute of Science and Technology (UNIST)
    Institute for Basic Science (IBS))

  • Nicola M. Pugno

    (University of Trento
    Queen Mary University of London
    Ket-Lab, Edoardo Amaldi Foundation, via del Politecnico snc)

  • Lorenz Kienle

    (Kiel University)

  • Andrea C. Ferrari

    (University of Cambridge)

  • Felice Torrisi

    (University of Cambridge
    Imperial College London)

  • Carsten Ronning

    (Friedrich-Schiller-University Jena)

  • Rainer Adelung

    (Kiel University)

Abstract

Laser diodes are efficient light sources. However, state-of-the-art laser diode-based lighting systems rely on light-converting inorganic phosphor materials, which strongly limit the efficiency and lifetime, as well as achievable light output due to energy losses, saturation, thermal degradation, and low irradiance levels. Here, we demonstrate a macroscopically expanded, three-dimensional diffuser composed of interconnected hollow hexagonal boron nitride microtubes with nanoscopic wall-thickness, acting as an artificial solid fog, capable of withstanding ~10 times the irradiance level of remote phosphors. In contrast to phosphors, no light conversion is required as the diffuser relies solely on strong broadband (full visible range) lossless multiple light scattering events, enabled by a highly porous (>99.99%) non-absorbing nanoarchitecture, resulting in efficiencies of ~98%. This can unleash the potential of lasers for high-brightness lighting applications, such as automotive headlights, projection technology or lighting for large spaces.

Suggested Citation

  • Fabian Schütt & Maximilian Zapf & Stefano Signetti & Julian Strobel & Helge Krüger & Robert Röder & Jürgen Carstensen & Niklas Wolff & Janik Marx & Tian Carey & Marleen Schweichel & Maik-Ivo Terasa & , 2020. "Conversionless efficient and broadband laser light diffusers for high brightness illumination applications," Nature Communications, Nature, vol. 11(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-14875-z
    DOI: 10.1038/s41467-020-14875-z
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