Showing papers in "Optical Materials in 2012"

TL;DR: In this article, a co-precipitation method and annealing at 500°C for 2h under Ar atmosphere was used to synthesize nanopowders with different microstructure without changing a hexagonal wurtzite structure.

TL;DR: In this article, the effect of growth temperature (T s ) on the growth behavior, microstructure and optical properties of Y 2 O 3 thin films was investigated, and the results indicated that tuning optical properties for desired applications can be achieved by controlling the size and structure at the nanoscale dimensions.

TL;DR: The year 2010 marks the 50th anniversary of the invention of the first laser device, ruby laser and it is therefore an appropriate time to look back at the developments in the laser field since its inception and to try to map out its milestones.

TL;DR: In this paper, the development of parametric down-conversion devices operating in the mid-infrared, from 3μm to about 20μm, based on non-oxide nonlinear optical crystals is reviewed.

TL;DR: This review addresses various techniques used for increasing the ambient contrast ratio of OLED displays and provides a brief overview of each technique along with a discussion on its merits and demerits.

TL;DR: In this paper, low temperature CdSe quantum dots are prepared by using 2-mercaptoethanol as capping agent for the first time and the resulting nanocrystals are characterized by X-ray diffraction, transmission electron microscopy (TEM), UV-vis absorption spectra and photoluminescence (PL) spectroscopy.

TL;DR: In this article, the authors presented an intense visible blue to red luminescence obtained from synthesized few layered graphene-zinc oxide (FLG-ZnO) based nanostructures prepared via a sol-gel method using ZnO precursors and a FLG solution.

TL;DR: In this article, the effect of thermalization on the oscillator strengths of the absorption transitions originating from the ground and the first excited (7F1) states of Eu3+ ions have been discussed.

TL;DR: In this article, the spectral dependence of both the chitosan and chitin refractive indices was obtained for wavelengths between 250 and 750 nm. But the spectral properties of chitins were not considered.

TL;DR: In this paper, an active phosphate matrix codoped with Er3+ and Yb3+ rare earth optically active ions has been studied by carrying out steady-state and time-resolved luminescence spectroscopies.

TL;DR: In this article, the optical properties of undoped and aluminium-doped zinc oxide nanostructures grown on glass substrates using the hydrothermal method were analyzed and optical properties such as index of refraction, extinction coefficient, dielectric constants and optical conductivity were determined using the transmission and the reflection at normal incidence of light in the wavelength range of 200-1100nm.

TL;DR: In this article, the authors compared the empirical relation between Mo O bond length and stretching mode wavenumber for a suite of sixteen complex molybdates and found that this relation is unusable for molybates containing different cations in the crystal lattice.

TL;DR: In this paper, different concentrations of Sm 3+ doped strontium lithium bismuth borate glasses (SLBiB) have been prepared by melt quench technique and investigated their optical, structural and dielectric properties.

TL;DR: In this paper, the McCumber theory has been applied to evaluate the emission cross-section using the absorption crosssection of the 4 I 13/2 ǫ→ 4 I 15/2 transition of Er 3+ ion.

TL;DR: In this paper, the effects of SiO2 and MgO on the microstructure and sintering process of Nd:YAG ceramics were studied.

TL;DR: In this paper, the authors measured the optical absorption, emission, and fluorescence lifetime of 0.1, 1, 5, and 10 at% Yb:CaF2 ceramics to determine whether Yb3+ substitutes as hexamer clusters giving rise to the tenability and long fluorescent lifetime observed in single crystals.

TL;DR: In this paper, the X-band EPR spectroscopy of the Li 2 B 4 O 7 :Cr and KLiB 4 O7 :Cr tetraborate glasses were investigated at T ǫ = 300 K.

TL;DR: In this paper, the photoluminescence properties of Dy3+ single doped calcium aluminoborate glass (Dy3+/Eu3+ co-doped glass) were studied under UV-light excitation.

TL;DR: In this paper, the optical properties of Ho3+-doped lead phosphate glasses have been characterized through absorption, emission and gain spectra and decay rate analysis, and a strong dependence of the Ω2 parameter on the hypersensitive transition has been noticed.

TL;DR: The external quantum efficiency of Tb3+-doped phosphate glass fibers has been reported to be 78% as mentioned in this paper, which is the highest up to date compared with other Tb 3+doped materials reported in previous literatures.

TL;DR: In this paper, a spectroscopic investigation of glasses activated with Sm 3+ and Tb 3+ /Sm 3+ ions is performed through their luminescence spectra and decay times.

TL;DR: In this article, a qualitative description of the growth process, which analyzes the role of nitrogen dissociation or ionization in (Ar+N 2 ) atmosphere for the sputtering of a silicon target, is the key factor to interpret the obtained results.

TL;DR: Ce3+-doped high silica glass was prepared by impregnation of Ce ions into a porous silica, followed by high temperature sintering in a CO reducing atmosphere as mentioned in this paper, and the characteristic emission of Ce3+ 5d − 4f transition peaking around 375nm was observed in its luminescence spectra under UV and X-ray excitation.

TL;DR: In this paper, a detailed comparison of the triboluminescent emission yields resulting from low energy drops for 27 luminescent materials is presented, which is only the first step towards the development of a practical TL-based impact sensor.

TL;DR: In this paper, a single phase of CaLa 1− x Mg M ′O 6 : x Eu 3+ (M′ ǫ= Nb, Ta; 0, x Â⩽ Â 1) red phosphors was prepared by solid-state reaction method, and their structural and optical properties were also investigated in detail.

TL;DR: In this paper, high optical quality transparent Yb:YAG laser ceramics have been successfully fabricated by a vacuum reactive sintering method using commercial Al 2 O 3 powder and co-precipitated Y 2O 3 and Yb 2 O3 powders.

TL;DR: In this paper, single crystals of Cu2ZnSn(SxSe1−x)4 (CZTSSe) solid solutions were grown by chemical vapor transport technique using iodine trichloride as a transport agent.

TL;DR: In this article, the results of the characterization of polymer electrolytes using gelatin matrix doped with europium triflate and/or different ionic liquids were described and characterized by ionic conductivity measurements, thermal analysis, electrochemical stability, X-ray diffraction and photoluminescence spectroscopy.

TL;DR: In this article, a new NaAlSiO4:0.1Eu2+ phosphors were synthesized at different temperatures using a liquid phase precursor (LPP) technique.

TL;DR: In this article, the position of constituent atoms in the unit cells of the Ag x Ga x Ge 1− x Se 2 single crystals have been determined, and the charge states of Ag, Ga, and Ge atoms do not alter when varying the x value, whilst the negative charge of selenium atoms slightly decreases with decreasing x value.