Showing papers in "Optical Materials in 2000"

TL;DR: In this paper, spontaneous Raman spectra of tungstate (MeWO4) and molybdate (MeMoO4), with sheelite structure were investigated (Me=Ca, Sr, Ba, Pb).

TL;DR: In this article, the formation and ultraviolet (UV) absorption features of the ions were studied in a fluoride phosphate (FP) and two phosphate glasses, and the band separation of the UV absorption spectra was carried out to reveal the components and to determine their spectroscopic properties.

TL;DR: In this article, the passive scattering losses were measured in near single-mode optical waveguide fibers with well-centered transparent glass-ceramic cores using difference spectra, and it was shown that the incremental intrinsic losses of these glassceramic structures will be in the range of 100 dB/km or less.

TL;DR: In this article, Dy3+-doped borate glasses modified with lithium oxide and fluoride are presented, and the intensity parameters are used to predict radiative properties that include electric (Sed) and magnetic (Smd) dipole line strengths, radiative (A) and total radiative transition probabilities, lifetimes (τR), branching ratios (βR) for the excited ( 4 K (1) 13/2, 4 F (3) 5/2), 4 P (2) 3/2, 4 M 21/2 ), 4 G (

TL;DR: The spectral properties of the Er 3+ -doped lead halotellurite glasses, PbX 2 -TeO 2 (X=F, Cl, Br), were measured and analyzed with Judd-Ofelt and McCumber theories.

TL;DR: Lissamine functionalized terphenyl-based Nd complexes are synthesized, and incorporated in deuterated dimethylsulfoxide solutions and partially fluorinated planar polymer waveguides as discussed by the authors.

TL;DR: In this paper, the morphological, electrical and optical properties of VO 2 thermochromic thin films synthesized by excimer pulsed laser ablation are reported, and the results show that these films optically switch abruptly from 28% in the metal state to nearly 72% approximately in the semi-conducting state at 3000 nm upon cooling through the transition well centred around 68°C.

TL;DR: In this article, the authors focus on the band structure of semiconductors and propose a variety of methods such as tight binding, pseudopotential, and k • p methods.

TL;DR: In this article, optical absorption and emission properties of Er and Er-Yb-doped phosphate glasses are investigated both at low and room temperature in the near infrared spectral region between 800 and 2000 nm, and the results are thoroughly discussed in connection with the expected transitions originating from the crystal field split 4 I 15/2 and 4 I 13/2 levels of the Er 3+ ion.

TL;DR: In this paper, photo-induced optical second harmonic generation (SHG) was studied in SiC nanocrystallites embedded within the photo-polymer oligoetheracrylate matrices.

TL;DR: In this article, a crack free YBO 3 waveguide thin film with 16 layers and thickness of about 850 nm was used for dip-coating through sol-gel route and it was found that the coating process obeys a two-step kinetics.

TL;DR: In this paper, an acoustically induced optical second harmonic generation (SHG) in CsLiB6O10 (CLBO) nanocrystallites incorporated into the olygoether photopolymer matrices has been revealed at liquid helium temperature (4.2 K).

TL;DR: In this article, a single crystal of Nd:YVO 4 was grown by the Czochralski method and the absorption and fluorescence spectra of the crystal were measured.

TL;DR: In this article, the role of Na 2 O and PbO in increasing the optical band gap and the Urbach energy ( ΔE ) values have been evaluated by following the available semi-empirical theories.

TL;DR: In this paper, the up-conversion mechanism of nanocrystalline Er 3+ :BaTiO 3 powders under infrared excitations at both 980 and 810 nm has been analyzed and explained.

TL;DR: In this article, pure and praseodymium-doped thin films of Ge30Ga5Se65 amorphous system were prepared by the pulsed laser deposition (PLD) technique.

TL;DR: In this article, the third-order optical nonlinearities of surface modified PbS nanoparticles have been measured using the Z-scan technique with femtosecond laser pulses at 780 nm wavelength.

TL;DR: In this article, the relationship between the energy gap, optical electronegativity and bulk modulus for compound and ternary chalcopyrite semiconductors was investigated.

TL;DR: In this paper, the magnetic and optical properties of Nd3+ in three zircon type crystals YMO4 (M=V, As, P) were studied.

TL;DR: In this paper, the optical properties of polyvinyl chloride (PVC) with poly(ethylene oxide) (PEO) polymer electrolytes were analyzed in terms of the absorption coefficient and the optical band energy gap.

TL;DR: In this article, the authors investigated the thermal effects on the width and position of the popular laser line at 1061.7 nm (R 1 ǫ→Y 1 ) of the inter-Stark transition within the 4 F 3/2, 4 I 9/2 and 4 I 11/2 intermanifold transition of Nd 3+ :YVO 4 in YVO 4 laser host.

TL;DR: In this paper, the primary optical limiting effects (OLE) of the gel induced by dimers are investigated with a frequency double Q-switched Nd 3+ :YAG laser of 8 ns pulse.

TL;DR: In this paper, photo-induced birefringence has been measured by a pump-probe experiment in pure silica and ORMOSILs (ORganically MOdified SILanes) thin films containing Disperse Red 1 (DR1).

TL;DR: In this article, up-conversion spectroscopy at low temperature is used to probe the symmetry of the sites occupied by the Tm3+ ion in MF2:TmF3 (with M=Sr, Ca, Ba ) and in CdF2: TmF 3, NaF.

TL;DR: In this paper, the first successful synthesis of nanocrystalline thermochromic VO2 powder using the low temperature irreversible structural transformation of the metastable VO2(B) was described.

TL;DR: In this paper, the dependence of electrical and optical properties of indium oxide (In2O3) films on the substrate temperature was studied, showing that the films formed at 373 K were amorphous, whereas those prepared at ⩾473 K were polycrystalline in nature.

TL;DR: In this article, the compositional and optical properties of the films have been measured by proton-induced X-ray emission (PIXE) and spectrophotometry (photon wavelength range of 300-2500 nm), respectively.

TL;DR: In this article, the spectroscopic refractive indices for nine zircon-structure orthophosphate compounds (LnPO 4, where Ln=Sc, Y, Tb, Dy, Ho, Er, Tm, Yb, and Lu) were determined from 270 to 850 nm using two-modulator generalized ellipsometry.

TL;DR: In this paper, the authors used reflection spectroscopy to obtain the refractive index of Zn 1− x Mg x Se layers for the series of alloy composition x, at energies below the energy gap of these semiconductors.

TL;DR: In this paper, chemical enhancement of wild-type bacteriorhodopsin, site-specific mutants D96E and D96N results in significant increase of the photoanisotropic response.