Showing papers in "Optical Materials in 2010"

TL;DR: In this article, the requirements for efficient and photostable luminescent concentrators are summarized and the latest results and ideas for materializing them are provided and shown how they can be materialized.

TL;DR: In this article, a method to place the levels of all trivalent lanthanides with respect to the top of the valence band and bottom of the conduction band in oxides containing transition metal complexes was proposed.

TL;DR: In this paper, the photoluminescence properties of Pr3+, Sm3+ and Er3+ doped phosphate glasses were investigated at room temperature, and the results showed strong absorption bands in the near-infrared and visible (VIS) regions.

TL;DR: In this article, the effect of glass matrix modifiers on color and d-d electron spectra of chosen transition metal ions was analyzed using the analysis of colour and electron spectras of the obtained glasses, and it was shown that the chemical composition of the glass matrix influences the coordination state of the transition metal.

TL;DR: In this article, the photoluminescent properties including the internal quantum efficiency for the M 2 V 2 O 7 (M: Ba, Sr, and Ca) as a new vanadate phosphor system were investigated.

TL;DR: In this article, an efficient near-infrared quantum cutting (QC) in Ce 3+, Yb 3+ co-doped YBO 3 phosphors has been demonstrated, which involves the emission of two low-energy NIR photons (around 973nm) from an absorbed ultra-violet (UV) photon at 358nm via a cooperative energy transfer (CET) from Ce 3+, to Yb3+, ions.

TL;DR: In this article, the X-ray-induced radiophotoluminescence (RPL) bands in a silver-activated phosphate glass (PG:Ag) were investigated using optical characterisation such as absorption, excitation, emission and lifetime measurements.

TL;DR: In this paper, the upconversion color tunability via pump power adjustment will promote the development of three-dimensional solid-state displays and up-conversion illumination devices, and a series of white fluorescences with a large range of correlated color temperature (CCT) was obtained.

TL;DR: In this paper, the experimental intensity parameters were calculated according to the Judd-Ofelt theory, from which the radiative transition probabilities, fluorescence branching ratios, and radiative lifetimes of Er3+ were obtained.

TL;DR: In this paper, the dependence of infrared photoluminescence (PL) spectra on doping concentration shows a quenching of the PL intensity for Er 3+ concentration above 2 mol%.

TL;DR: In this article, the optical and structural properties of HfO2 thin films in relation to rapid thermal annealing (RTA) temperatures are investigated by spectroscopic ellipsometry (SE), X-ray diffraction (XRD) and UV Raman spectrum.

TL;DR: This review will focus on examples of OIHs that can be used in IO devices for the next generation of optical networks, andphasis will be given to passive (planar and channel waveguides, couplers and multimode interference splitters) and active (lasers and optical amplifiers) optical architectures for long haul/metro and access/indoor networks.

TL;DR: In this paper, white light emitting diodes (LEDs) were fabricated using an InGaN 460-nm blue emission LED chip as the excitation source and CdSe quantum dots dispersed in PMMA as the phosphor.

TL;DR: In this article, Europium doped calcium titanate (CT:Eu 3+ ) powders containing 0.5, 1.0% and 2.0 % were syn- thesized by hydrothermal microwave method (HTMW) at 140 C for 10 min.

TL;DR: Ce3+/Eu2+ co-doped Li2SrSiO4 phosphor yields two emission bands consisted of blue and yellow components, which shows great potential as single host white phosphor for white LEDs as discussed by the authors.

TL;DR: In this paper, two micrometer emission of Ho3+-doped new fluorophosphate glass sensitized by Yb3+ upon excitation of a conventional 980-nm laser diode is reported.

TL;DR: Eu3+ doped LaPO4 nanorods with monoclinic system have been prepared at relatively low temperature (150°C) in ethylene glycol medium.

TL;DR: Y3−xMg2AlSi2O12: Ce x 3 + (YMASG:Ce) phosphors were synthesized by sol-gel combustion technique at different temperatures from 1400 to 1550°C as discussed by the authors.

TL;DR: In this article, the authors measured the absorption and emission spectra of Tm 3+ -doped bismuthate glass to obtain the radiative lifetimes by Judd-Ofelt theory.

TL;DR: The third-order nonlinear optical susceptibilities χ(3) of tellurite-based ternary glasses of MO-Nb2O5-TeO2 (M = Zn, Mg, Ca, Sr, Ba) were investigated by Z-scan measurement using Ti:Sapphire femtosecond laser pulses.

TL;DR: In this article, the Eu-doped and Eu/Al-codoped high silica glasses (HSGs) were prepared by infiltration and densification method, and the results indicate the reduction of Eu 3+ to Eu 2+ ions partly in Eu /Al codoped HSGs.

TL;DR: In this article, the second and fourth-rank zero-field splitting (ZFSP) parameters for Fe3+ ions at two In sites in TlInS2 single crystal were calculated using the superposition model (SPM) and crystallographic data.

TL;DR: In this article, the first hollow core photonic crystal fibers (HC PCF) in chalcogenide glass were fabricated by the stack and draw technique from TAS glass.

TL;DR: In this paper, the potential of white LEDs of various glasses into which Ca−α−SiAlON:Eu2+ phosphor was dispersed was investigated, and the color generated by irradiation of blue LED at 450nm depended on the concentration of SiAlON and the thickness of the glasses.

TL;DR: In this paper, structural and spectroscopic properties of neodymium doped sodium borate and fluoroborate glasses were investigated using XRD, FTIR, absorption and emission spectra and decay curve.

TL;DR: In this paper, transparent oxy-fluoride glass-ceramics doped with Tm3+ have been obtained from glasses in the system K2O-Na2O−Al2O3−SiO2-LaF3 by heat treatments slightly above the glass transition temperature, Tg.

TL;DR: In this paper, the relationship between linear optics represented by linear refractive indexes n0 and optical band gap Eopg was studied, and it was shown that non-linear index γ increases with increasing n0, the largest value of γ is 5.108 × 10−18 m2/W.

TL;DR: A red phosphor K2SnF6·H2O:Mn4+ has been synthesized from metallic tin by wet chemical etching in HF/KMnO4 mixed solution as discussed by the authors.

TL;DR: In this paper, a planar waveguide coactivated by Tb 3+ /Yb 3+) ions was fabricated by sol gel route using a top-down approach.

TL;DR: The first experimental evidences of intervalence charge transfer (IVCT) transitions in Pr 3+ and Tb 3+ -doped double tungstate crystals KRE(WO 4 ) 2 (RE = Y, Gd, Yb, Lu) are reported in this article.