Laser-induced down-conversion parameters of singly and doubly doped ZnS phosphors

Pramana ◽  
2005 ◽  
Vol 65 (3) ◽  
pp. 541-546 ◽  
Author(s):  
H. S. Bhatti ◽  
Rajesh Sharma ◽  
N. K. Verma
Keyword(s):  
Down Conversion ◽  
Zns Phosphors

Generation of Optical—Terahertz Biphotons and Detection of Their Terahertz Component under Frequency-Nondegenerate Parametric Down-Conversion

JETP Letters ◽  
2020 ◽  
Vol 112 (5) ◽  
pp. 269-273
Author(s):  
V. D. Sultanov ◽  
K. A. Kuznetsov ◽  
A. A. Leontyev ◽  
G. Kh. Kitaeva
Keyword(s):  
Parametric Down Conversion ◽  
Down Conversion

UWB down-conversion mixer using an IM3 cancellation modified technique for zero and low IF applications

2021 ◽  
Vol 109 ◽  
pp. 104983
Author(s):  
Hosein Seyedi ◽  
Ramin Dehdasht-Heydari ◽  
Saeed Roshani
Keyword(s):  
Modified Technique ◽  
Down Conversion

Understanding up and down-conversion luminescence for Er3+/Yb3+ co-doped SiO2-SnO2 glass-ceramics

2021 ◽  
pp. 159405
Author(s):  
Cao T.M. Dung ◽  
Le T.T. Giang ◽  
Do Huy Binh ◽  
Le Van Hieu ◽  
Tran T.T. Van
Keyword(s):  
Glass Ceramics ◽  
Down Conversion ◽  
Co Doped

scholarly journals Melt-Spun Photoluminescent Polymer Optical Fibers for Color-Tunable Textile Illumination

Materials ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1740
Author(s):  
Konrad Jakubowski ◽  
Manfred Heuberger ◽  
Rudolf Hufenus
Keyword(s):  
Energy Transfer ◽  
Optical Fibers ◽  
Color Space ◽  
Emission Spectra ◽  
Wide Range ◽  
Color Tunable ◽  
Melt Spun ◽  
Polymer Optical Fibers ◽  
Collective Emission ◽  
Down Conversion

The increasing interest in luminescent waveguides, applied as light concentrators, sensing elements, or decorative illuminating systems, is fostering efforts to further expand their functionality. Yarns and textiles based on a combination of distinct melt-spun polymer optical fibers (POFs), doped with individual luminescent dyes, can be beneficial for such applications since they enable easy tuning of the color of emitted light. Based on the energy transfer occurring between differently dyed filaments within a yarn or textile, the collective emission properties of such assemblies are adjustable over a wide range. The presented study demonstrates this effect using multicolor, meltspun, and photoluminescent POFs to measure their superimposed photoluminescent emission spectra. By varying the concentration of luminophores in yarn and fabric composition, the overall color of the resulting photoluminescent textiles can be tailored by the recapturing of light escaping from individual POFs. The ensuing color space is a mean to address the needs of specific applications, such as decorative elements and textile illumination by UV down-conversion.

scholarly journals Recrystallization of CsPbBr3 Nanoparticles in Fluoropolymer Nonwoven Mats for Down- and Up-Conversion of Light

Nanomaterials ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 412
Author(s):  
Vladimir Neplokh ◽  
Daria I. Markina ◽  
Maria Baeva ◽  
Anton M. Pavlov ◽  
Demid A. Kirilenko ◽  
...  
Keyword(s):  
Mechanical Stability ◽  
Uv Light ◽  
Visible Spectral Range ◽  
High Quantum Yield ◽  
Environmental Robustness ◽  
Nonwoven Mats ◽  
Down Conversion ◽  
Green Photoluminescence ◽  
Significant Attention ◽  
Narrow Emission

Inorganic halides perovskite CsPbX3 (X = Cl, Br, and I or mixed halide systems Cl/Br and Br/I) nanoparticles are efficient light-conversion objects that have attracted significant attention due to their broadband tunability over the entire visible spectral range of 410–700 nm and high quantum yield of up to 95%. Here, we demonstrate a new method of recrystallization of CsPbBr3 nanoparticles inside the electrospun fluoropolymer fibers. We have synthesized nonwoven tetrafluoroethylene mats embedding CsPbBr3 nanoparticles using inexpensive commercial precursors and syringe electrospinning equipment. The fabricated nonwoven mat samples demonstrated both down-conversion of UV light to 506 nm and up-conversion of IR femtosecond laser radiation to 513 nm green photoluminescence characterized by narrow emission line-widths of 35 nm. Nanoparticle formation inside nonwoven fibers was confirmed by TEM imaging and water stability tests controlled by fluorimetry measurements. The combination of enhanced optical properties of CsPbBr3 nanoparticles and mechanical stability and environmental robustness of highly deformable nonwoven fluoropolymer mats is appealing for flexible optoelectronic applications, while the industry-friendly fabrication method is attractive for commercial implementations.

Integrating photon up- and down-conversion to produce efficient light-harvesting materials for enhancing natural photosynthesis

2021 ◽  
Author(s):  
Mingyue Jiang ◽  
Yue Yuan ◽  
Yuchen Fang ◽  
Shouxin Liu ◽  
Jian Li ◽  
...  
Keyword(s):  
Light Harvesting ◽  
Plant Research ◽  
Down Conversion ◽  
Natural Photosynthesis ◽  
Working Efficiency

Using light-harvesting materials to enhance natural photosynthesis is attracting much attention in both materials and plant research. The working efficiency of most light-harvesting materials is, however, compromised by a narrow...

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