Journal ArticleDOI
Influence of YAB:Cr3+ nanocrystallite sizes on two-photon absorption of YAB:Cr3+
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TLDR
An influence of nanocrystalline sizes of YAB:Cr particles incorporated within olygoetheracrylate polymer matrix on the two-photon absorption was investigated in this paper.Abstract:
An influence of nanocrystalline sizes of YAB:Cr particles incorporated within olygoetheracrylate polymer matrix on the two-photon absorption was investigated. Maximal values of the two-photon absorption diagonal tensor component was observed at low temperatures (about 4.2 K) and corresponded to concentration of the YAB:Cr NC about the 3% by weight and about 22 nm in sizes. The Cr3+ ions inside investigated NC play the crucial role in the observed nonlinear optical phenomena. The observed temperature dependence is explained within a model of anharmonic electron–phonon contribution in the nanocrystallites. (© 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)read more
Citations
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The structural influence of chromium ions in lead gallium phosphate glasses by means of spectroscopic studies
TL;DR: PbO-Ga2O3-P2O5 glasses containing different concentrations of Cr2O 3 ranging from 0 to 1.0% were prepared and a number of studies viz., differential thermal analysis, infrared, optical absorption, ESR and Raman spectra of these glasses have been carried out as a function of chromium ion concentration as mentioned in this paper.
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Valence and coordination of chromium ions in ZnO-Sb2O3-B2O3 glass system by means of spectroscopic and dielectric relaxation studies
TL;DR: In this paper, a number of studies viz., differential thermal analysis, infrared, optical absorption, Raman and ESR spectra and dielectric properties (constant e ′, loss tan δ, a.c. conductivity σac over a wide range of frequency and temperature) of these glasses have been carried out.
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Characterization and physical properties of Li2O-CaF2-P2O5 glass ceramics with Cr2O3 as a nucleating agent-physical properties
TL;DR: In this article, the optical absorption, ESR and magnetic susceptibility of glass-ceramic samples have been analyzed by a graphical method and the spreading of dielectric relaxation has been established.
Journal ArticleDOI
Borate Crystals for Nonlinear Optical and Laser Applications: A Review
TL;DR: The development of borate-based single crystals for laser and frequency conversion applications is reviewed in this article, where the basic idea behind nonlinear optics and the role of anionic groups in the borate crystals are summarized.
Journal ArticleDOI
The role of chromium ions on dielectric and spectroscopic properties of Li2O–PbO–B2O3–P2O5 glasses
S. Yusub,D. Krishna Rao +1 more
TL;DR: Li 2 O−PbO-B 2 O 3 −P 2 O 5 glasses containing different concentrations of Cr 2 O3 ranging from 0 to 1 mol% were synthesized by melt quenching technique as discussed by the authors.
References
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Journal ArticleDOI
Efficient pseudopotentials for plane-wave calculations. II. Operators for fast iterative diagonalization
TL;DR: For systems containing a large number of atoms the computational load can be reduced if the pseudopotential operator is of a suitable form, such that it can be efficiently calculated in the position representation.
Journal ArticleDOI
Relativistic band structure calculation of cubic and hexagonal SiC polytypes
Clas Persson,Ulf Lindefelt +1 more
TL;DR: In this article, a full-potential band structure calculation, within the local density approximation to the density functional theory, has been performed for the polytypes 3C, 2H, 4H, and 6H of SiC.
Journal ArticleDOI
Local-density-derived semiempirical nonlocal pseudopotentials for InP with applications to large quantum dots
Huaxiang Fu,Alex Zunger +1 more
TL;DR: In this paper, a series of bulk, local density-approximation (LDA) calculations are performed on a few InP crystal structures, covering a range of unit-cell volumes, to produce bulk potentials.
Journal ArticleDOI
Dielectric properties of I-III- VI 2 -type chalcopyrite semiconductors
TL;DR: In this article, the authors quantitatively studied the dielectric properties of I-III-${\mathrm{VI}}_{2}$-type ternary chalcopyrite semiconductors, including linear and second order nonlinear optical susceptibilities at 10.6 \ensuremath{\mu}m, from the chemical bond viewpoint.
Journal ArticleDOI
Synthesis and properties of nm-sized Sn2P2Se6 single crystals embedded in photopolymeric host
TL;DR: The Sn2P2Se6 single nanocrystallites embedded in a photopolymeric oligoetheracrylate host were manufactured and structural and electrooptical investigations unambiguously show a possibility to obtain specimens which have properties similar to the properties of bulk single crystals as discussed by the authors.