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Shiv P Halasyamani - One of the best experts on this subject based on the ideXlab platform.
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Ba4B8TeO19: A UV Nonlinear Optical Material
2018Co-Authors: Lili Liu, Joshua Young, Manuel Smeu, Shiv P HalasyamaniAbstract:We report a new noncentrosymmetric barium tellurium borate, Ba4B8TeO19 that has potential ultraviolet (UV) Nonlinear Optical (NLO) applications. Ba4B8TeO19 was synthesized by a flux method and crystallizes in the noncentrosymmetric space group Cc. The Material exhibits a framework structure of [B8O17]∞ double layers connected to distorted TeO6 octahedra. Second harmonic generation (SHG) measurements at 1064 and 532 nm on polycrystalline Ba4B8TeO19 indicate that the title compound is phase-matchable (type I) with a moderate SHG response (1 × KH2PO4 at 1064 nm and 0.2 × β-BaB2O4 at 532 nm). In addition, a short absorption edge (210 nm) was measured. Using density functional theory calculations, we show that the SHG response originates from contributions from O 2p and Te 5s states at the valence and conduction band edges. Finally, by computing the linear Optical properties, we find that this compound displays a moderate birefringence of 0.055 at 1064 nm and 0.059 at 532 nm, necessary conditions for phase-matching in UV NLO Materials
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deep ultraviolet Nonlinear Optical Material k3sr3li2al4b6o20f addressing the structural instability problem in kbe2bo3f2
Inorganic Chemistry, 2017Co-Authors: Shilie Pan, Shiv P HalasyamaniAbstract:A beryllium-free deep-ultraviolet (DUV) Nonlinear-Optical (NLO) Material, K3Sr3Al4Li2B6O20F, has been synthesized and characterized. Unlike KBe2BO3F2 (KBBF), the reported NLO Material does not require the use of toxic BeO in the synthesis, and through the judicious selection of cations, strong interlayer interactions are observed that facilitate the crystal growth. K3Sr3Al4Li2B6O20F exhibits second-harmonic generation (SHG) at both 1064 and 532 nm with efficiencies of 1.7KH2PO4 and 0.3β-BaB2O4 and has an absorption edge of 190 nm. Because of the strong interlayer interactions, we were able to grow well-faceted large crystals, 8 × 8 × 5 mm3, through a top-seeded-solution-growth technique. With these crystals, we determined a birefringence of 0.0574 at 1064 nm and a type I phase-matching SHG limit of 224 nm.
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design and synthesis of the beryllium free deep ultraviolet Nonlinear Optical Material ba3 znb5o10 po4
ChemInform, 2016Co-Authors: Hongwei Yu, Joshua Young, James M Rondinelli, Weiguo Zhang, Shiv P HalasyamaniAbstract:The title compound is synthesized by solid state reaction of a stoichiometric mixture of BaCO3, ZnO, H3BO3, and NH4H2PO4 (Pt crucible, 840 °C, 72 h).
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design and synthesis of the beryllium free deep ultraviolet Nonlinear Optical Material ba3 znb5o10 po4
Advanced Materials, 2015Co-Authors: Hongwei Yu, Joshua Young, James M Rondinelli, Weiguo Zhang, Shiv P HalasyamaniAbstract:Access to the elusive deep-ultraviolet by direct second harmonic generation (SHG) enabled by a new beryllium-free zincoborate-phosphate crystal is reported. Ba3(ZnB5O10)PO4, exhibits large SHG responses at 1064 and 532 nm and a short 180 nm absorption edge. Centimeter-size crystals are grown, and quantum mechanical calculations demonstrate the key role played by ZnO4 tetrahedra in the enhanced Optical responses.
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rbmgco3f a new beryllium free deep ultraviolet Nonlinear Optical Material
Journal of the American Chemical Society, 2015Co-Authors: Thao T Tran, Jiangang He, James M Rondinelli, Shiv P HalasyamaniAbstract:A new deep-ultraviolet Nonlinear Optical Material, RbMgCO3F, has been synthesized and characterized. The achiral nonpolar acentric Material is second harmonic generation (SHG) active at both 1064 and 532 nm, with efficiencies of 160 × α-SiO2 and 0.6 × β-BaB2O4, respectively, and exhibits a short UV cutoff, below 190 nm. RbMgCO3F possesses a three-dimensional structure of corner-shared Mg(CO3)2F2 polyhedra. Unlike other acentric carbonate fluorides, in this example, the inclusion of Mg2+ creates pentagonal channels where the Rb+ resides. Our electronic structure calculations reveal that the denticity of the carbonate linkage, monodentate or bidendate, to the divalent cation is a useful parameter for tuning the transparency window and achieving the sizable SHG response.
Hongwei Yu - One of the best experts on this subject based on the ideXlab platform.
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design and synthesis of the beryllium free deep ultraviolet Nonlinear Optical Material ba3 znb5o10 po4
ChemInform, 2016Co-Authors: Hongwei Yu, Joshua Young, James M Rondinelli, Weiguo Zhang, Shiv P HalasyamaniAbstract:The title compound is synthesized by solid state reaction of a stoichiometric mixture of BaCO3, ZnO, H3BO3, and NH4H2PO4 (Pt crucible, 840 °C, 72 h).
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design and synthesis of the beryllium free deep ultraviolet Nonlinear Optical Material ba3 znb5o10 po4
Advanced Materials, 2015Co-Authors: Hongwei Yu, Joshua Young, James M Rondinelli, Weiguo Zhang, Shiv P HalasyamaniAbstract:Access to the elusive deep-ultraviolet by direct second harmonic generation (SHG) enabled by a new beryllium-free zincoborate-phosphate crystal is reported. Ba3(ZnB5O10)PO4, exhibits large SHG responses at 1064 and 532 nm and a short 180 nm absorption edge. Centimeter-size crystals are grown, and quantum mechanical calculations demonstrate the key role played by ZnO4 tetrahedra in the enhanced Optical responses.
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pb7o oh 3 co3 3 bo3 first mixed borate and carbonate Nonlinear Optical Material exhibiting large second harmonic generation response
ChemInform, 2015Co-Authors: Maierhaba Abudoureheman, Xianming Zhang, Li Wang, Hongwei YuAbstract:The title UV Nonlinear Optical Material is hydrothermally synthesized from Pb(NO3)2, H3BO3, Cs2CO3, and KOH in the molar ratio 1:4:1:10 (autoclave, 180 °C, 12 h, 75% yield).
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pb7o oh 3 co3 3 bo3 first mixed borate and carbonate Nonlinear Optical Material exhibiting large second harmonic generation response
Inorganic Chemistry, 2015Co-Authors: Maierhaba Abudoureheman, Xianming Zhang, Li Wang, Hongwei YuAbstract:The first borate carbonate UV Nonlinear Optical Material Pb7O(OH)3(CO3)3(BO3) was hydrothermally synthesized, which features a (3,9)-connected IrSi3-like structure constructed by Pb7O(OH)3(BO3) units and carbonates. This compound exhibits a large second-harmonic generation (SHG) response about 4.5 times that of KH2PO4 (KDP), attributed to synergistic interactions between the stereoeffect of the Pb(II) cations and coparallel BO3 and CO3 triangles groups.
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designing a deep ultraviolet Nonlinear Optical Material with a large second harmonic generation response
ChemInform, 2013Co-Authors: Hongping Wu, Kenneth R. Poeppelmeier, Hongwei Yu, Xin Su, James M RondinelliAbstract:Ba4B11O20F is synthesized by solid state reaction of a stoichiometric mixture of Ba(NO3)2, H3BO3, and BaF2 (780 °C, 2 d).
James M Rondinelli - One of the best experts on this subject based on the ideXlab platform.
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design and synthesis of the beryllium free deep ultraviolet Nonlinear Optical Material ba3 znb5o10 po4
ChemInform, 2016Co-Authors: Hongwei Yu, Joshua Young, James M Rondinelli, Weiguo Zhang, Shiv P HalasyamaniAbstract:The title compound is synthesized by solid state reaction of a stoichiometric mixture of BaCO3, ZnO, H3BO3, and NH4H2PO4 (Pt crucible, 840 °C, 72 h).
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design and synthesis of the beryllium free deep ultraviolet Nonlinear Optical Material ba3 znb5o10 po4
Advanced Materials, 2015Co-Authors: Hongwei Yu, Joshua Young, James M Rondinelli, Weiguo Zhang, Shiv P HalasyamaniAbstract:Access to the elusive deep-ultraviolet by direct second harmonic generation (SHG) enabled by a new beryllium-free zincoborate-phosphate crystal is reported. Ba3(ZnB5O10)PO4, exhibits large SHG responses at 1064 and 532 nm and a short 180 nm absorption edge. Centimeter-size crystals are grown, and quantum mechanical calculations demonstrate the key role played by ZnO4 tetrahedra in the enhanced Optical responses.
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rbmgco3f a new beryllium free deep ultraviolet Nonlinear Optical Material
Journal of the American Chemical Society, 2015Co-Authors: Thao T Tran, Jiangang He, James M Rondinelli, Shiv P HalasyamaniAbstract:A new deep-ultraviolet Nonlinear Optical Material, RbMgCO3F, has been synthesized and characterized. The achiral nonpolar acentric Material is second harmonic generation (SHG) active at both 1064 and 532 nm, with efficiencies of 160 × α-SiO2 and 0.6 × β-BaB2O4, respectively, and exhibits a short UV cutoff, below 190 nm. RbMgCO3F possesses a three-dimensional structure of corner-shared Mg(CO3)2F2 polyhedra. Unlike other acentric carbonate fluorides, in this example, the inclusion of Mg2+ creates pentagonal channels where the Rb+ resides. Our electronic structure calculations reveal that the denticity of the carbonate linkage, monodentate or bidendate, to the divalent cation is a useful parameter for tuning the transparency window and achieving the sizable SHG response.
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cs3zn6b9o21 a chemically benign member of the kbbf family exhibiting the largest second harmonic generation response
Journal of the American Chemical Society, 2014Co-Authors: Shilie Pan, Kenneth R. Poeppelmeier, Zhihua Yang, Xueling Hou, Qun Jing, James M RondinelliAbstract:Nonlinear Optical (NLO) crystals are essential Materials for generation of coherent UV light in solid state lasers. KBBF is the only Material that can achieve coherent light below 200 nm by direct second harmonic generation (SHG). However, its strong layer habits and the high toxicity of the beryllium oxide powders required for synthesis limit its application. By substituting Be with Zn and connecting adjacent [Zn2BO3O2]∞ layers by B3O6 groups, a new UV Nonlinear Optical Material, Cs3Zn6B9O21, was synthesized. It overcomes the processing limitations of KBBF and exhibits the largest SHG response in the KBBF family.
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designing a deep ultraviolet Nonlinear Optical Material with a large second harmonic generation response
ChemInform, 2013Co-Authors: Hongping Wu, Kenneth R. Poeppelmeier, Hongwei Yu, Xin Su, James M RondinelliAbstract:Ba4B11O20F is synthesized by solid state reaction of a stoichiometric mixture of Ba(NO3)2, H3BO3, and BaF2 (780 °C, 2 d).
H Steinfink - One of the best experts on this subject based on the ideXlab platform.
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characterization of new infrared Nonlinear Optical Material with high laser damage threshold li2ga2ges6
Chemistry of Materials, 2008Co-Authors: Steve W. Martin, Jaewook Baek, Nachiappan Arumugam, Shiv P Halasyamani, H SteinfinkAbstract:A new thio-germanium sulfide Li2Ga2GeS6 has been synthesized for the first time and its structure was found to be isomorphous with AgGaGeS4, which is well-known as a promising infrared NLO Material. The host structure is built of GaS4 tetrahedra linked by corners to GeS4 tetrahedra to create a 3D framework forming tunnels along the c-axis, in which the Li+ ions are located. The second harmonic generation (SHG) efficiency determined on powders of Li2Ga2GaS6 is ∼200 times larger than that of α-SiO2. Unlike AgGaS2 and AgGaGeS4, Li2Ga2GeS6 was observed to be very stable under prolonged Nd:YAG 1.064 μm laser pumping, indicative of a large improvement in laser damage threshold. This new Material could supplant Ag phases in the next generation of high-power infrared NLO applications.
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characterization of new infrared Nonlinear Optical Material with high laser damage threshold li2ga2ges6
Chemistry of Materials, 2008Co-Authors: Youngsik Kim, Jaewook Baek, Nachiappan Arumugam, Shiv P Halasyamani, Steve W. Martin, Inseok Seo, H SteinfinkAbstract:A new thio-germanium sulfide Li2Ga2GeS6 has been synthesized for the first time and its structure was found to be isomorphous with AgGaGeS4, which is well-known as a promising infrared NLO Material...
Yicheng Wu - One of the best experts on this subject based on the ideXlab platform.
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a new uv Nonlinear Optical Material cszn2b3o7 zno4 tetrahedra double the efficiency of second harmonic generation
Inorganic Chemistry, 2014Co-Authors: Sangen Zhao, Shuquan Zhang, Jia Zhang, Yicheng Wu, Maochun HongAbstract:A new noncentrosymmetric borate CsZn2B3O7 was synthesized by the solid-state reaction techniques. The crystals were obtained by flux method and are of block shape without layering tendency. Single-crystal X-ray diffraction analysis reveals that the crystal structure is composed of [Zn2BO5]∞ two-dimensional layers that are bridged by [B3O6]3– groups to form a three-dimensional framework with one-dimensional channels occupied by Cs+ cations along the a and c axes. Thermal analysis indicates that CsZn2B3O7 melts incongruently. UV–visible–near-IR diffuse reflectance spectrum gives a short absorption edge at 218 nm. CsZn2B3O7 is phase-matchable, with a powder second-harmonic generation (SHG) efficiency of 1.5 × KDP (KDP, potassium dihydrogen phosphate) at 1064 nm, based on the Kurtz–Perry method. These results show that CsZn2B3O7 may have prospects as a UV Nonlinear Optical Material. Interestingly, the SHG efficiency of CsZn2B3O7 is about twice that of γ-KBe2B3O7, a structurally analogous alkaline and alkaline...
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a new mixed halide cs2hgi2cl2 molecular engineering for a new Nonlinear Optical Material in the infrared region
Journal of the American Chemical Society, 2012Co-Authors: Gang Zhang, Huiyi Zeng, Peizhen Fu, Kui Jiang, Yanjun Li, Xingguo Chen, Yicheng Wu, Chuangtian ChenAbstract:A new mixed halide, Cs2HgI2Cl2, which contains the highly polar tetrahedron of anion (HgI2Cl2)2–, has been designed and synthesized by reaction in solution. In its single crystal, the isolated (HgCl2I2)2– groups are arranged to form chains. The chains are then further connected into a three-dimensional framework through the Cs atoms that occupy the empty spaces surrounded by halide atoms. All the polar (HgCl2I2)2– groups align in such a way that gives a net polarization, leading it to show a phase matchable second harmonic generation (SHG) effect as strong as that of KH2PO4 (KDP) based on the powder SHG measurement. It also displays excellent transparency in the range of 0.4–41 μm with relatively high thermal stability. A preliminary measurement indicates that its laser-induced damage threshold is about 83 MW/cm2, about twice that of AgGaS2. This study demonstrates that Cs2HgI2Cl2 is a promising Nonlinear Optical Material in the infrared region.
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ligage2se6 a new ir Nonlinear Optical Material with low melting point
ChemInform, 2012Co-Authors: Kai Feng, Yicheng WuAbstract:The new title compound is synthesized by solid state reaction of stoichiometric amounts of Li2Se, GeSe2, and Ga2Se3 (700 °C, 72 h).
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ligage2se6 a new ir Nonlinear Optical Material with low melting point
Inorganic Chemistry, 2012Co-Authors: Kai Feng, Yicheng WuAbstract:The new compound LiGaGe2Se6 has been synthesized. It crystallizes in the orthorhombic space group Fdd2 with a = 12.501(3) A, b = 23.683(5) A, c = 7.1196(14) A, and Z = 8. The structure is a three-dimensional framework composed of corner-sharing LiSe4, GaSe4, and GeSe4 tetrahedra. The compound exhibits a powder second harmonic generation signal at 2 μm that is about half that of the benchmark Material AgGaSe2 and possesses a wide band gap of about 2.64(2) eV. LiGaGe2Se6 melts congruently at a rather low temperature of 710 °C, which indicates that bulk crystals can be obtained by the Bridgman–Stockbarger technique. According to a first-principles calculation, there is strong hybridization of the 4s and 4p orbitals of Ga, Ge, and Se around the Fermi level. The calculated birefractive index is Δn = 0.04 for λ ≥ 1 μm, and the calculated major SHG tensor elements are d15 = 18.6 pm/V and d33 = 12.8 pm/V. This new Material is promising for application in IR Nonlinear optics.
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baga4se7 a new congruent melting ir Nonlinear Optical Material
ChemInform, 2010Co-Authors: Peizhen Fu, Yicheng WuAbstract:The new title compound is synthesized by solid state reaction of BaSe and Ga2Se3 in the molar ratio 1:2 (900 °C, 72 h).
