Thermophysical properties of lithium thiogallate that are important for optical applications

Kurus, A. F.; Yelisseyev, A.; Lobanov, S.; Plyusnin, P. E.; Мolokeev, Maxim S.; Solovyev, Leonid A.; Samoshkin, D. A.; Stankus, S. V.; Melnikova, S. V.; Исаенко, Л. И.

doi:10.1039/d1ra05698k

Cited by 8 publications

(5 citation statements)

References 38 publications

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“…[14] In addition, the thermodynamic properties are also significant for the radiation resistance of crystals. [15] High thermal conductivity and low anisotropy of thermal expansion coefficients (TEC) can increase considerably the LIDT of crystals. It is known that, for many chalcogenide compounds with an orthorhombic structure (e.g., Li-containing LiGaS 2 ), the anisotropy of TEC is significantly lower than for tetragonal crystals (e.g., Ag-containing AgGaSe 2 and LiGaSe 2 are two famous mid-infrared nonlinear optical (NLO) materials with similar chemical formula but different structural symmetry.…”

Section: Introductionmentioning

confidence: 99%

Li_xAg_1–_xGaSe₂: Interplay Between Lithium and Silver in Mid‐Infrared Nonlinear Optical Chalcogenides

Исаенко

Dong

Kurus

et al. 2022

Advanced Optical Materials

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AgGaSe2 and LiGaSe2 are two famous mid‐infrared nonlinear optical (NLO) materials with similar chemical formula but different structural symmetry. The former material has relatively larger NLO effect and birefringence but rather small energy band gap, while the latter is the opposite. Aiming at achieving a good balance of NLO properties, here the substitution between silver and lithium ions on the evolution of structural and optical properties in a new series of LixAg1–xGaSe2 crystals is systematically investigated. It reveals that, with the increase of Li content, LixAg1–xGaSe2 almost keeps the same tetragonal symmetry with AgGaSe2 until x ≈ 0.9. The NLO effects and birefringence values vary with respect to x with the largest variation at x = 0.8–0.9. The optimal combination of birefringence (0.03–0.025) and nonlinear parameters (26–30 pm V−1) is achieved at x = 0.4–0.5. As the energy band gap increases with the increase of x, the maximal value of 2.2 eV for chalcopyrite structure suggests that the laser‐induced damage threshold of LixAg1–xGaSe2 would be as large as five‐fold of AgGaSe2. This study provides a good example to show that the rational substitution between Li and Ag can significantly improve the balance of NLO properties in chalcogenides.

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Section: Introductionmentioning

confidence: 99%

Li_xAg_1–_xGaSe₂: Interplay Between Lithium and Silver in Mid‐Infrared Nonlinear Optical Chalcogenides

Исаенко

Dong

Kurus

et al. 2022

Advanced Optical Materials

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“…However, the thermal conductivity of the crystal is still an important parameter if the input peak intensity on the crystal reaches a relatively high value. According to reference [103], the thermal conductivity of LiGaS 2 is 3 to 5 times higher than that of AgGaS 2 and AgGaSe 2 and ~2.5 times higher than the thermal conductivity of layered GaSe along its optic axis, and the thermal conductivity of LiGaS 2 is 10.05 W/(m•k) [146]. However, the thermal conductivity of OP-GaP crystal is 110 W/(m•k) according to reference [116,135], which is the highest value to the best of our knowledge.…”

Section: Discussionmentioning

confidence: 99%

Generation of 8–20 μm Mid-Infrared Ultrashort Femtosecond Laser Pulses via Difference Frequency Generation

Zhu

Wang

et al. 2022

Photonics

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Mid-infrared (MIR) ultrashort laser pulses have a wide range of applications in the fields of environmental monitoring, laser medicine, food quality control, strong-field physics, attosecond science, and some other aspects. Recent years have seen great developments in MIR laser technologies. Traditional solid-state and fiber lasers focus on the research of the short-wavelength MIR region. However, due to the limitation of the gain medium, they still cannot cover the long-wavelength region from 8 to 20 µm. This paper summarizes the developments of 8–20 μm MIR ultrafast laser generation via difference frequency generation (DFG) and reviews related theoretical models. Finally, the feasibility of MIR power scaling by nonlinear-amplification DFG and methods for measuring the power of DFG-based MIR are analyzed from the author’s perspective.

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“…Their study found that the chosen compound is potential candidate for the linear as well as nonlinear optical properties in IR region and various applied applications. A. Kurus et al [19] have been investigated the thermophysical properties of LiGaS 2 chalcopyrite solid. Their observations ensure this compound is highly optical stable compound and this is the potential solid for manufacturing the various efficient thermoelectric devices.…”

Section: Introductionmentioning

confidence: 99%

Structural, electronic and thermoelectric properties of LiAlX2 (X=S and Se) chalcopyrites: promising for thermoelectric power generators

Kumari¹,

Singh²,

Agrawal³

et al. 2023

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Herein, we have inquired the structural, electronic and thermoelectric properties of the couple of chalcopyrite structured solids LiAlX2 (X=S and Se) with the help of density functional theory (DFT), which is tracked by resolution of the Boltzmann transport equation with the constant relaxation time calculations. The LDA (Localized Density Approximation), PBE (Perdew-Burke-Ernzerhof), PBEsol (PBE functional revised for solids) and WC (Wu-Cohen) exchange correlation potentials have been used. The calculated lattice constants a = 5.271 Å; c = 10.178 Å and a = 6.226 Å; c = 12.165 Å for LiAlS2 and LiAlSe2 respectively and the band gap of the mentioned compounds are found in range from 1.74 eV to 3.13 eV. The dependency of thermoelectric parameters are calculated with different temperature (300-800K) and carrier concentration 1018 1019 cm-3 . From the study of ZT (figure of merit’s ZT= S2 σT/κ the dimensionless parameter) and it is found that it’s value for both the compounds in n-type as well as in p-type region is ‘unity’. Since these compounds can be the promising candidate for thermoelectric devices also these compounds are non-toxic, eco-friendly and good alternative for the green and renewable source of electric power generators.

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Thermophysical properties of lithium thiogallate that are important for optical applications

Abstract: LiGaS2 crystals are grown, and the high thermal conductivity is established. Analysis of temperature dependences of various properties reveals side phases, and isotropic points in birefringence, photo-, thermo-, and pyroluminescence.

Cited by 8 publications

References 38 publications

Li_xAg_1–_xGaSe₂: Interplay Between Lithium and Silver in Mid‐Infrared Nonlinear Optical Chalcogenides

Li_xAg_1–_xGaSe₂: Interplay Between Lithium and Silver in Mid‐Infrared Nonlinear Optical Chalcogenides

Generation of 8–20 μm Mid-Infrared Ultrashort Femtosecond Laser Pulses via Difference Frequency Generation

Structural, electronic and thermoelectric properties of LiAlX2 (X=S and Se) chalcopyrites: promising for thermoelectric power generators

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Thermophysical properties of lithium thiogallate that are important for optical applications

Abstract: LiGaS2 crystals are grown, and the high thermal conductivity is established. Analysis of temperature dependences of various properties reveals side phases, and isotropic points in birefringence, photo-, thermo-, and pyroluminescence.

Cited by 8 publications

References 38 publications

LixAg1–xGaSe2: Interplay Between Lithium and Silver in Mid‐Infrared Nonlinear Optical Chalcogenides

LixAg1–xGaSe2: Interplay Between Lithium and Silver in Mid‐Infrared Nonlinear Optical Chalcogenides

Generation of 8–20 μm Mid-Infrared Ultrashort Femtosecond Laser Pulses via Difference Frequency Generation

Structural, electronic and thermoelectric properties of LiAlX2 (X=S and Se) chalcopyrites: promising for thermoelectric power generators

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Product

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Li_xAg_1–_xGaSe₂: Interplay Between Lithium and Silver in Mid‐Infrared Nonlinear Optical Chalcogenides

Li_xAg_1–_xGaSe₂: Interplay Between Lithium and Silver in Mid‐Infrared Nonlinear Optical Chalcogenides