Investigations into anisotropic properties of the nonlinear optical material CdTeMoO6 with quasi-two-dimensional structure

Li, Conggang; Gao, Zeliang; Tian, Xiangxin; Wu, Qian; Liu, Fuan; Du, Xiaoli; Huang, Dongyang; Sun, Youxuan; Cui, Deliang; Tao, Xutang

doi:10.1016/j.jallcom.2018.10.047

Cited by 12 publications

(12 citation statements)

References 42 publications

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“…Density is also an important reflection in differentiating different polymorphs in single crystals. , The density of β-BTM at room temperature was measured by the Archimedes method . Distilled water (40 mL) was poured into an empty beaker.…”

Section: Methodsmentioning

confidence: 99%

Crystallographic Investigations into the Polar Polymorphism of BaTeW₂O₉: Phase Transformation, Controlled Crystallization, and Linear and Nonlinear Optical Properties

Gao

Zhao

et al. 2019

Crystal Growth & Design

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Controlling polymorphism crystallization can be used to tune the intrinsic properties of a material without introducing any other atoms and is, therefore, of important technological significance. Although diversity in polymorphisms has been extensively studied, an intensive understanding of the relationships between their structure and properties is limited. Herein, a systematic investigation on the phase transformation, synthesis, structure, controlled growth, as well as the functional properties was performed for the polar metastable polymorph β-BaTeW2O9, which was grown via the top-seeded solution growth method using TeO2–WO3 as a flux. β-BaTeW2O9 crystallizes in an acentric space group P21 (No. 4, a = 5.499 (6) Å, b = 7.469 (9) Å, c = 8.936 (10) Å, and Z = 2), with a two-dimensional layered structure consisting of WO6 octahedra linked to TeO4 polyhedra. A notable phase transformation occurred from β-BaTeW2O9 to α-BaTeW2O9 at ∼608 °C and was demonstrated by the differential scanning calorimetry analysis combined with the in situ powder X-ray pattern measurements. This phase transformation was irreversible. This compound exhibited strong second harmonic generation response of 1.5 × KTiOPO4 (KTP) with a type-I phase-matching characteristic. Moreover, it also showed an excellent thermal stability and possessed a greatly broad transparent range from 0.325 to 5.70 μm with a large bandgap of 3.50 eV. In addition, electronic structure calculations revealed that WO6 and TeO4 are critical for producing a substantial nonlinear optical (NLO) response. These outstanding attributes indicate that β-BaTeW2O9 is a promising NLO material.

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Section: Methodsmentioning

confidence: 99%

Crystallographic Investigations into the Polar Polymorphism of BaTeW₂O₉: Phase Transformation, Controlled Crystallization, and Linear and Nonlinear Optical Properties

Gao

Zhao

et al. 2019

Crystal Growth & Design

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“…As the temperature increases from −140 to 100 °C, the thermal conductivity along the ⟨001⟩ orientation decreases from 2.06 to 1.05 W/(m·K) and then remains stable. Acousto-optic devices should be operated in low temperature for space mission, while high thermal conductivity at low temperature is beneficial for transferring deposited heat to the environment to decrease the effect of thermal loading. , …”

Section: Resultsmentioning

confidence: 99%

“…Acousto-optic devices should be operated in low temperature for space mission, while high thermal conductivity at low temperature is beneficial for transferring deposited heat to the environment to decrease the effect of thermal loading. 21,23 The thermal conductivities of Hg 2 Br 2 crystals show large anisotropy along the ⟨001⟩ orientation and perpendicular to the ⟨001⟩ orientation. The thermal conductivity in solid materials is mainly realized by lattice wave of lattice vibration and motion of free electrons.…”

Section: Resultsmentioning

confidence: 99%

“…The thermal conductivity can be determined according to the following formula where λ is the thermal diffusivity coefficient, ρ is the density, and C p is the specific heat. ,, A laser flash apparatus (NETZSCH LFA 457 Nanoflash) was employed to measure the thermal diffusivities of Hg 2 Br 2 in the range of 25–150 °C. The (110) and (001) Hg 2 Br 2 crystal samples with a size of 4 × 4 × 1 mm 3 were used for the test, and both large faces were coated with graphite.…”

Section: Methodsmentioning

confidence: 99%

“…The smallest full width at half maximum (fwhm) of the polished Hg 2 Br 2 wafer rocking curve is 0.78°, while that of the cleaved Hg 2 Br 2 wafer rocking curve is 0.029°; therefore, the comprehensive characterization of anisotropic mechanical properties is necessary for the processing of technology optimization and the device fabrication of Hg 2 Br 2 crystals. Additionally, the temperature-dependent thermal properties of Hg 2 Br 2 , such as specific heat and thermal conductivity, which affect the damage threshold and efficiency of the devices, , have not been characterized extensively. The comprehensive characterization of temperature-dependent thermal properties is crucial for further enhancing the performance of AOTFs based on Hg 2 Br 2 crystals.…”

Section: Introductionmentioning

confidence: 99%

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Growth and Temperature-Dependent Mechanical and Thermal Properties of One-Dimensional Chain Structure Hg₂Br₂ Crystals for Infrared Acousto-Optic Device Application

Lin

et al. 2021

Crystal Growth & Design

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The long-wave infrared acousto-optic tunable filters (AOTFs) based on Hg2Br2 crystals have attracted much interest in space exploration and harmful chemical agent detection. However, the growth of large Hg2Br2 single crystals with high quality and optical homogeneity still remains a challenge, and the lack of temperature-dependent mechanical and thermal properties of this crystal hinders the further enhancement of acousto-optic performance in practical applications. In this context, Hg2Br2 crystals (Φ 35 × 40 mm3) were successfully grown by the physical vapor transport (PVT) method. The optical homogeneity of the as-grown crystal is increased to 7.15 × 10–5 by restraining the impurities, striations, and cracks. In addition, the anisotropic mechanical and thermal properties varying with the temperature of Hg2Br2 crystals were systematically investigated. The compression modulus along the ⟨110⟩ orientation decreases from 17 to 7 GPa in the temperature range of −100 to 150 °C, while it ranges from 5.5 to 1.5 GPa along the ⟨001⟩ orientation. The thermal conductivities along ⟨110⟩ and ⟨001⟩ orientations vary in the range of 1.32–0.52 and 2.06–1.05 W/(m·K) with the increase in temperature from −140 to 100 °C, respectively, and then remain stable in the range of 100–150 °C. Using the first-principles calculation on the electron transfer characteristic between atoms and the bonding property within molecules of Hg2Br2 crystals, the large anisotropic mechanical and thermal properties could be explained, which are mainly attributed to the one-dimensional chain structure of the compound. Notably, the mechanical and thermal properties of Hg2Br2 crystals at low temperature are better than those at high temperature, which guarantees the practical application of AOTFs in a space extreme environment.

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Long wavelength infrared acousto-optic crystal Hg2Br2: Growth optimization and photosensitivity investigation

Zhang

et al. 2021

Journal of Alloys and Compounds

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Investigations into anisotropic properties of the nonlinear optical material CdTeMoO6 with quasi-two-dimensional structure

Cited by 12 publications

References 42 publications

Crystallographic Investigations into the Polar Polymorphism of BaTeW₂O₉: Phase Transformation, Controlled Crystallization, and Linear and Nonlinear Optical Properties

Crystallographic Investigations into the Polar Polymorphism of BaTeW₂O₉: Phase Transformation, Controlled Crystallization, and Linear and Nonlinear Optical Properties

Growth and Temperature-Dependent Mechanical and Thermal Properties of One-Dimensional Chain Structure Hg₂Br₂ Crystals for Infrared Acousto-Optic Device Application

Long wavelength infrared acousto-optic crystal Hg2Br2: Growth optimization and photosensitivity investigation

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Investigations into anisotropic properties of the nonlinear optical material CdTeMoO6 with quasi-two-dimensional structure

Cited by 12 publications

References 42 publications

Crystallographic Investigations into the Polar Polymorphism of BaTeW2O9: Phase Transformation, Controlled Crystallization, and Linear and Nonlinear Optical Properties

Crystallographic Investigations into the Polar Polymorphism of BaTeW2O9: Phase Transformation, Controlled Crystallization, and Linear and Nonlinear Optical Properties

Growth and Temperature-Dependent Mechanical and Thermal Properties of One-Dimensional Chain Structure Hg2Br2 Crystals for Infrared Acousto-Optic Device Application

Long wavelength infrared acousto-optic crystal Hg2Br2: Growth optimization and photosensitivity investigation

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Crystallographic Investigations into the Polar Polymorphism of BaTeW₂O₉: Phase Transformation, Controlled Crystallization, and Linear and Nonlinear Optical Properties

Crystallographic Investigations into the Polar Polymorphism of BaTeW₂O₉: Phase Transformation, Controlled Crystallization, and Linear and Nonlinear Optical Properties

Growth and Temperature-Dependent Mechanical and Thermal Properties of One-Dimensional Chain Structure Hg₂Br₂ Crystals for Infrared Acousto-Optic Device Application