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A Highly-Efficient Single Segment White Random Laser
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SYSNO ASEP 0499173 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title A Highly-Efficient Single Segment White Random Laser Author(s) Haider, Golam (UFCH-W) ORCID, RID
Lin, H. I. (TW)
Yadav, K. (TW)
Shen, K. C. (TW)
Liao, Y.-Y. (TW)
Hu, H. W. (TW)
Roy, P. K. (TW)
Bera, K. P. (TW)
Lin, K. H. (TW)
Lee, H. M. (TW)
Chen, Y. T. (TW)
Chen, F. R. (TW)
Chen, Y. F. (TW)Source Title ACS Nano. - : American Chemical Society - ISSN 1936-0851
Roč. 12, č. 12 (2018), s. 11847-11859Number of pages 13 s. Language eng - English Country US - United States Keywords high photonic density of states ; hyperbolic meta-materials ; single segment multicolor laser ; up-conversion ; white random laser Subject RIV CF - Physical ; Theoretical Chemistry OECD category Physical chemistry R&D Projects LTC18039 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) EF16_027/0008355 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UFCH-W - RVO:61388955 UT WOS 000454567500012 EID SCOPUS 85056089105 DOI 10.1021/acsnano.8b03035 Annotation Production of multicolor or multiple wavelength lasers over the full visible-color spectrum from a single chip device has widespread applications, such as superbright solid-state lighting, color laser displays, light-based version of Wi-Fi (Li-Fi), and bioimaging, etc. However, designing such lasing devices remains a challenging issue owing to the material requirements for producing multicolor emissions and sophisticated design for producing laser action. Here we demonstrate a simple design and highly efficient single segment white random laser based on solution-processed NaYF4:Yb/Er/Tm@NaYF4:Eu core-shell nanoparticles assisted by Au/MoO3 multilayer hyperbolic meta-materials. The multicolor lasing emitted from core-shell nanoparticles covering the red, green, and blue, simultaneously, can be greatly enhanced by the high photonic density of states with a suitable design of hyperbolic meta-materials, which enables decreasing the energy consumption of photon propagation. As a result, the energy upconversion emission is enhanced by ∼50 times with a drastic reduction of the lasing threshold. The multiple scatterings arising from the inherent nature of the disordered nanoparticle matrix provide a convenient way for the formation of closed feedback loops, which is beneficial for the coherent laser action. The experimental results were supported by the electromagnetic simulations derived from the finite-difference time-domain (FDTD) method. The approach shown here can greatly simplify the design of laser structures with color-tunable emissions, which can be extended to many other material systems. Together with the characteristics of angle free laser action, our device provides a promising solution toward the realization of many laser-based practical applications. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2019
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