Crystal structure and nonlinear optical properties of KSnOPO<sub>4</sub> and their comparison with KTiOPO<sub>4</sub>

Thomas, Philip A.; Glazer, A. M.; Watts, B.E.

doi:10.1107/s0108768190001318

Cited by 121 publications

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“…39 According to the a/b ratio, the vicinal wall with maximal kink density is deviated from X axis at the angle 26.5 ( Fig. 8(b)), which agreed with the experimentally observed orientation of X þ30 wall.…”

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confidence: 78%

Domain wall orientation and domain shape in KTiOPO4 crystals

Shur

Vaskina

Пелегова

et al. 2016

Applied Physics Letters

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Domain shape evolution and domain wall motion have been studied in KTiOPO4 (KTP) ferroelectric single crystals using complementary experimental methods. The in situ visualization of domain kinetics has allowed revealing: (1) qualitative change of the domain shape, (2) dependence of the domain wall velocity on its orientation, (3) jump-like domain wall motion caused by domain merging, (4) effect of domain shape stability. The model of domain wall motion driven by generation of elementary steps (kink-pair nucleation) and subsequent kink motion is presented. The decrease in the relative velocity of the approaching parallel domain walls is attributed to electrostatic interaction. The effect of polarization reversal induced by chemical etching is observed. The obtained results are important for the development of domain engineering in the crystals of KTP family.

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confidence: 78%

Domain wall orientation and domain shape in KTiOPO4 crystals

Shur

Vaskina

Пелегова

et al. 2016

Applied Physics Letters

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“…whether +c or -c points upward on the diffractometer with respect to our choice of structural coordinates which were taken from Thomas et al (1990).…”

Section: Interpretation Of Experimental Results For Sample (2)mentioning

confidence: 99%

“…(6) The space group describing the high-temperature phase of KTP is Pnan (Thomas et al, 1990;Harrison, Gier, Stucky & Schultz, 1990). Space group Pnan is generated from Pna2~ by any of the symmetry operations 21010] at (0, y, 1/4), 21100] at (x, 0, 0) or an n-glide plane perpendicular to [001] at z = 0.…”

Section: Interpretation Of Experimental Results For Sample (2)mentioning

confidence: 99%

Potassium titanyl phosphate, KTiOPO4. I. Experimental investigation of optical gyration, absolute optical chirality and twinning

Thomas¹,

Tebbutt²,

Glazer³

1991

J Appl Cryst

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Abstract. The optical gyrations of a domain-flee sectionand of a twinned section of the nonlinear optical crystal KTiOPO4 have been measured using a high-accuracy universal polarimeter. An optical gyration at 6328 A equivalent to an optical rotation of +22 ° mm -1 together with a significant circular dichroic contribution was found in the domain-free (210) section whereas equivalent rotations varying between +14 and -20 ° mm -1 were found in different regions of the twinned section. The absolute indices of the faces of the samples and the existence of twinning in the second section have been established using X-ray anomalous scattering. The regions of opposite optical chirality in the twinned sample have been shown to correlate with those of opposite structural chirality. The results are used to show that the twinning operation in this KTiOPO4 crystal must be one of the twofold rotations 21010] or 21100].

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“…For example, it is unknown whether the pivot atom between adjacent domains is defined by the orientation of the domain walls, or whether the thickness of the domain walls changes from the surface to bulk regions. KTP and its isomorphs pole anisotropically, favouring domain growth along [010] on the conventional Pna2 1 setting of the cell with a = 12.819 (3), b = 6.399 (1), c = 10.584 (2) Å (Thomas et al, 1990). Gratings of good integrity were produced with walls designed to be parallel to (100) planes (a-poled), whereas the b-poled gratings with walls parallel to (010) were of a poor quality.…”

Section: Introductionmentioning

confidence: 99%

X-ray investigation of lateral hetero-structures of inversion domains in LiNbO₃, KTiOPO₄and KTiOAsO₄

Lyford¹,

Collins

Fewster³

et al. 2015

Acta Cryst Sect A

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In this paper periodically domain-inverted (PDI) ferroelectric crystals are studied using high-resolution X-ray diffraction. Rocking curves and reciprocalspace maps of the principal symmetric Bragg reflections in LiNbO 3 (LN) (Ã = 5 mm), KTiOPO 4 (KTP) (Ã = 9 mm) and KTiOAsO 4 (KTA) (Ã = 39 mm) are presented. For all the samples strong satellite reflections were observed as a consequence of the PDI structure. Analysis of the satellites showed that they were caused by a combination of coherent and incoherent scattering between the adjacent domains. Whilst the satellites contained phase information regarding the structure of the domain wall, this information could not be rigorously extracted without a priori knowledge of the twinning mechanism. Analysis of the profiles reveals strain distributions of Ád/d = 1.6 Â 10 À4 and 2.0 Â 10 À4 perpendicular to domain walls in KTP and LN samples, respectively, and lateral correlation lengths of 63 mm (KTP), 194 mm (KTA) and 10 mm (LN). The decay of crystal truncation rods in LN and KTP was found to support the occurrence of surface corrugations.

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Crystal structure and nonlinear optical properties of KSnOPO₄ and their comparison with KTiOPO₄

Cited by 121 publications

References 0 publications

Domain wall orientation and domain shape in KTiOPO4 crystals

Domain wall orientation and domain shape in KTiOPO4 crystals

Potassium titanyl phosphate, KTiOPO4. I. Experimental investigation of optical gyration, absolute optical chirality and twinning

X-ray investigation of lateral hetero-structures of inversion domains in LiNbO₃, KTiOPO₄and KTiOAsO₄

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Crystal structure and nonlinear optical properties of KSnOPO4 and their comparison with KTiOPO4

Cited by 121 publications

References 0 publications

Domain wall orientation and domain shape in KTiOPO4 crystals

Domain wall orientation and domain shape in KTiOPO4 crystals

Potassium titanyl phosphate, KTiOPO4. I. Experimental investigation of optical gyration, absolute optical chirality and twinning

X-ray investigation of lateral hetero-structures of inversion domains in LiNbO3, KTiOPO4and KTiOAsO4

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Crystal structure and nonlinear optical properties of KSnOPO₄ and their comparison with KTiOPO₄

X-ray investigation of lateral hetero-structures of inversion domains in LiNbO₃, KTiOPO₄and KTiOAsO₄