Physical, chemical and optical properties of barium nitrate Raman crystal

Zverev, Petr G.; Basiev, Tasoltan T.; Osiko, V. V.; Kulkov, A. M.; Voĭtsekhovskiĭ, V. N.; Yakobson, Viktor

doi:10.1016/s0925-3467(98)00031-7

Cited by 118 publications

(48 citation statements)

References 20 publications

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“…It is an efficient scintillator at low temperatures, and has gained a lot of interest due to the possibility of combining laser and Raman properties in the same media [9]. Both pure and rare earth doped SrWO 4 are used as Raman converters, amplifiers and lasers [10][11][12][13]. Some little work was reported by Patel and Arora [14,15] and Packter and Roy [16] on the crystal growth.…”

Section: Introductionmentioning

confidence: 99%

Crystallization and optical properties of CaWO4 and SrWO4

Arora¹,

Chudasama

2006

Cryst. Res. Technol.

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Single crystals of calcium tungstate and strontium tungstate have been grown by double decomposition flux reaction technique using lithium chloride as flux. Growth conditions are optimized to synthesize well faceted crystals. Effect of primary and secondary flux density in the growth charge has been studied. Thermogravimetric study reveals that the grown crystals are highly stable in the temperature range 25 -1000°C. Analysis of optical absorption normal to the ab-plane in the spectral range of 200 -800 nm reveals the true absorption edge, the nature of transition being the allowed indirect one at 4.60 eV and 4.56 eV respectively for CaWO 4 and SrWO 4 . The crystals have been characterized by determining useful pertinent optical and dielectric parameters.

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Section: Introductionmentioning

confidence: 99%

Crystallization and optical properties of CaWO4 and SrWO4

Arora¹,

Chudasama

2006

Cryst. Res. Technol.

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“…SRS allows shifting laser radiation frequency with a certain energy shift that is determined by the crystal structure of Raman materials. At present, the most commonly used Raman-active crystals are Ba(NO 3 ) 2 and KGd(WO 4 ) 2 [8][9][10][11][12]. Among the tungstate crystals, BaWO 4 is proposed to be a universal Raman-active crystal for its high gain in both nano-and pico-second pumping regimes [7,8,13,14].…”

Section: Introductionmentioning

confidence: 99%

Optical phonon modes and transmissivity in BaWO₄ single crystal

Ran

Xia

Sun

et al. 2006

Cryst. Res. Technol.

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Barium tungstate (BaWO 4 ) single crystal has been grown using Czochralski technique. It belongs to the scheelite structure, forming the space group I4 1 /a at room temperature and the primitive cell contains two molecular units. The polarized Raman spectra were recorded by a micro-Raman spectrophotometer system in the backscattering geometry. All the observed Raman modes were assigned. The Raman mode at 924 cm -1 , which belongs to the totally symmetrical A g optical modes, has the strongest intensity and its linewidth is 4.6 cm -1. The infrared active lattice vibrations have been studied, eight optical modes were observed and assigned. The ultraviolet absorption edge is at 256 nm and the optical transparency range is up to 2500 nm at room temperature. The energy gap E g of this crystal was obtained from the optical transmission spectra.

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“…For example, as frequency converter in tunable lasers for expansion tuning range, for production of additional emission band combined with elements of doubling and summation of frequency, as optical filter for wave band 1.8-2.4 µm and so on. 4,5) Optical uniformity of barium nitrate single crystals is comparable with the quality of barium-and calciumfluoride optical crystals. Anomalous birefrigence in some areas does not exceed 5 nm/cm.…”

Section: Introductionmentioning

confidence: 84%

Barium Nitrate Single Crystals Growth by Aqueous Solution Method

Joo¹,

Kang²

2012

Korean. J. Mater. Res.

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The growing conditions of barium nitrate Ba(NO 3 ) 2 single crystals using the aqueous solution method have been studied. Supersaturation can be calculated by measuring the temperature of the solution and its equilibrium temperature. Supersaturation of Ba(NO 3 ) 2 was 0.7% at 32.0 o C and about 3% at 34.0 o C. The obtained single crystals have three kind of morphology: tetrahedral, cubic, and, rarely, dodecahedral. The normal growth rate is proportional to the supersaturation; it is necessary to make the solution below 5% supersaturation in order to obtain transparent Ba(NO 3 ) 2 single crystals. The normal growth rate for { } faces was 2.51 × 10 −6 mm/s for the 0.7% supersaturation condition (32.0 o C), 6.43 × 10 −6 mm/s for the the condition of 3.0% supersaturation, and 7.01 × 10 −6 mm/s for the condition of 5.0% supersaturation. The quality of the grown crystals depends on the nature of the seed, the cooling rate employed, and the agitation of the solution. The faces of the obtained crystals have been identified uising an X-ray diffractometer. The surface diffusion is responsible for the low growth rates of the { } faces.

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Physical, chemical and optical properties of barium nitrate Raman crystal

Cited by 118 publications

References 20 publications

Crystallization and optical properties of CaWO4 and SrWO4

Crystallization and optical properties of CaWO4 and SrWO4

Optical phonon modes and transmissivity in BaWO₄ single crystal

Barium Nitrate Single Crystals Growth by Aqueous Solution Method

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Physical, chemical and optical properties of barium nitrate Raman crystal

Cited by 118 publications

References 20 publications

Crystallization and optical properties of CaWO4 and SrWO4

Crystallization and optical properties of CaWO4 and SrWO4

Optical phonon modes and transmissivity in BaWO4 single crystal

Barium Nitrate Single Crystals Growth by Aqueous Solution Method

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Product

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Optical phonon modes and transmissivity in BaWO₄ single crystal