The Refractive Properties of Uniaxially Stressed Doped TGS Crystals

Stadnyk, V. Yo.; Romanyuk, M. O.

doi:10.1080/00150190590963534

Cited by 7 publications

(3 citation statements)

References 6 publications

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“…The coefficients determined in this work are slightly less, confirming an increase of the elastic stiffness for the doped TGS crystals. On the other hand, analogous results have already been obtained for LiKSO 4 , RbNH 4 SO 4 and (NH 4 ) 2 BeF 4 crystals, as well as for the Rochelle salt and KDР [16,17,19], where both increasing and decreasing of Т c was observed, depending on the stress direction, and the "total" shift coefficients for Т c are negative. The PT shifts were explained by the influence of temperature and stress on the shifts of structural elements taking place at the PT's.…”

Section: Resultssupporting

confidence: 80%

“…These fields affect the properties of the crystal the same way as external fields applied to the crystal, so that the sample becomes spontaneously single-domain or a particular geometry of the domain structure is kept fixed [7,8]. Introduction of L-threonine and L-valine leads to weakening temperature dependence of the refractive indices, birefringence and thermal expansion of the crystals [9,10].…”

Section: Introductionmentioning

confidence: 99%

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Birefringence of mechanically clamped TGS crystals with L-valine admixture

Stadnyk¹,

Romanyuk²,

KIRYK³

et al. 2011

Chem. Met. Alloys

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The influence of uniaxial mechanical stresses applied along the crystal-physical axes on the principal values of the birefringence, ∆ ∆ ∆ ∆n i , was studied for TGS crystals with 5% L-valine admixture. It was found that ∆ ∆ ∆ ∆n i are quite sensitive to stress and adopt different values and opposite signs, when compared to pure TGS. The baric coefficients ∂ ∂ ∂ ∂Т c /∂ ∂ ∂ ∂σ m for the phase transition (PT) temperature appear to be less than for pure TGS. The temperature dependence of the combined piezooptic constants 0 im π was calculated. The values of the jumplike changes occurring for all the piezooptic constants at the PT are notably lower for the doped crystals than for pure TGS.

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Section: Resultssupporting

confidence: 80%

Section: Introductionmentioning

confidence: 99%

Birefringence of mechanically clamped TGS crystals with L-valine admixture

Stadnyk¹,

Romanyuk²,

KIRYK³

et al. 2011

Chem. Met. Alloys

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“…Green light of 550 nm was allowed to travel through [010] of the crystal. The birefringence was calculated using the reaction Δ n = k λ/ d where Δ n is the birefringence value, k is the order of the interference maximum, λ is the light wavelength, and d is the sample thickness along the light propagation direction; the birefringence value is found to be 0.103 at a wavelength of 550 nm for a sample thickness of 0.11 mm.…”

Section: Resultsmentioning

confidence: 99%

Bulk Growth and Characterization of Semi-Organic Nonlinear Optical Bis Thiourea Bismuth Chloride Single Crystals

Sankar

Raghavan

Jayavel

2007

Crystal Growth & Design

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Growth and property studies of a new nonlinear optical (NLO) metal-organic crystal, bis thiourea bismuth chloride (BTBC), is reported. BTBC crystals were grown from aqueous solution by a slow-cooling technique. It has been observed that the solution pH influences the growth rate along the [001] and [010] directions. The grown crystals have been characterized for their structural, thermal, mechanical, linear, and NLO properties. BTBC is found to be a uniaxial and optically positive crystal. The birefringence value of BTBC is found to be 0.103. BTBC crystallizes in a hexagonal system, and the complex formation is stabilized by a metal-sulfur bond. BTBC has good optical transmission in the entire visible region and hence is a potential material for nonlinear frequency conversion.

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