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

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Title
Conversionless efficient and broadband laser light diffusers for high brightness illumination applications
Author(s)
Schutt, F; Zapf, M; Signetti, S; Strobel, J; Kruger, H; Roder, R; Carstensen, J; Wolff, N; Marx, J; Carey, T; Schweichel, M; Terasa, MI; Siebert, L; Hong, HK; Kaps, S; Fiedler, B; Mishra, YK; Lee, Z; Pugno, NM; Kienle, L; Ferrari, AC; Torrisi, F; Ronning, C; Adelung, R
Publication Date
2020-03
Journal
NATURE COMMUNICATIONS, v.11, no.1, pp.1437 -
Publisher
NATURE PUBLISHING GROUP
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 similar to 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 similar to 98%. This can unleash the potential of lasers for high-brightness lighting applications, such as automotive headlights, projection technology or lighting for large spaces. Laser-based lighting typically relies on wavelength conversion materials that reduce efficiency. The authors present a 3D boron nitride hollow-tube based foam structure that acts as a broadband diffuser with engineered disorder for conversionless white light generation from laser-diode light source. © The Author(s) 2020
URI
https://pr.ibs.re.kr/handle/8788114/7142
ISSN
2041-1723
Appears in Collections:
Center for Multidimensional Carbon Materials(다차원 탄소재료 연구단) > Journal Papers (저널논문)
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