Two rare-earth-based quaternary chalcogenides EuCdGeQ4 (Q = S, Se) with strong second-harmonic generation.

@article{Xing2019TwoRQ,
  title={Two rare-earth-based quaternary chalcogenides EuCdGeQ4 (Q = S, Se) with strong second-harmonic generation.},
  author={Wenhao Xing and Naizheng Wang and Yangwu Guo and Zhuang Li and Jian Tang and Kaijin Kang and Wenlong Yin and Zheshuai Lin and Jiyong Yao and Bin Kang},
  journal={Dalton transactions},
  year={2019}
}
Two new rare-earth-based chalcogenides EuCdGeQ4 (Q = S, Se) have been designed and constructed by using Eu2+ and the classical NLO-active SBUs of [CdQ4] and [GeQ4]. They crystallize in a non-centrosymmetric Ama2 (no. 40) space group. Benefiting from the synergistic effects of [GeQ4] and highly distorted [CdQ4] tetrahedra, both compounds possess type-I phase-matching behaviour and large powder second harmonic generation (SHG) effects at 2.09 μm (2.6 and 3.8 × AgGaS2 for sulfide and selenide), as… 
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References

SHOWING 1-10 OF 48 REFERENCES
In-phase alignments of asymmetric building units in Ln4GaSbS9 (Ln = Pr, Nd, Sm, Gd-Ho) and their strong nonlinear optical responses in middle IR.
New noncentrosymmetric rare-earth metal gallium thioantimonates, Ln(4)GaSbS(9) were synthesized from stoichiometric element mixtures at 950 °C by high-temperature solid-state reactions. These
AHgSnQ4 (A = Sr, Ba; Q = S, Se): A Series of Hg-Based Infrared Nonlinear-Optical Materials with Strong Second-Harmonic-Generation Response and Good Phase Matchability.
TLDR
All four Hg-based IR nonlinear-optical materials show phase-matching behavior, and the results of first-principles calculation elucidate the key role of the HgQ4 group in the enhanced SHG effect in β-BaHgSnS4 and BaHg SnSe4.
BaGa2MQ6 (M = Si, Ge; Q = S, Se): a new series of promising IR nonlinear optical materials.
TLDR
All the four BaGa(2)MQ(6) compounds exhibit congruent-melting behavior, which indicates that bulk crystals needed for practical applications can be obtained by the Bridgman-Stockbarger method.
Structure change induced by terminal sulfur in noncentrosymmetric La2Ga2GeS8 and Eu2Ga2GeS7 and nonlinear-optical responses in middle infrared.
TLDR
Two new noncentrosymmetric quaternary sulfides have been synthesized by high-temperature solid-state reactions and it is shown that the reduced cation charge-compensation requirement causes a decrease in the number of terminal S atoms per formula, which is a key to determining the connectivity of the GaS (4) and GeS(4) building units.
REI₅O₁₄ (RE= Y and Gd): Promising SHG Materials Featuring the Semi-Circle Shaped I₅O₁₄³¯ Polyiodate Anion.
TLDR
This work shows that the hydrothermal reaction under phosphoric acid medium facilitates the formation of rare-earth polyiodates.
BaCdSnS4 and Ba3CdSn2S8: syntheses, structures, and non-linear optical and photoluminescence properties.
TLDR
The origin of the NLO response in BaCdSnS4 may originate from the macroscopic arrangement of the SnS4 and CdS4 tetrahedra, and the photoluminescence properties of the two compounds have also been investigated and show obvious blue and green light emission.
BaGa4Se7: a new congruent-melting IR nonlinear optical material.
TLDR
This new material is a very promising NLO crystal for practical application in the IR region and exhibits a second harmonic generation response at 1 μm that is approximately 2-3 times that of the benchmark material AgGaS(2).
KLi(HC3N3O3)·2H2O: Solvent-drop Grinding Method toward the Hydro-isocyanurate Nonlinear Optical Crystal.
TLDR
Characterization of these crystals indicates that KLi(HC3N3O3)·2H2O has a high laser damage threshold (LDT) and exhibits a large birefringence (Δ n = 0.186@514 nm), which reduces Type I phase-matching to 246 nm.
Trigonal Planar [HgSe3](4-) Unit: A New Kind of Basic Functional Group in IR Nonlinear Optical Materials with Large Susceptibility and Physicochemical Stability.
TLDR
A new mercury selenide BaHgSe2 was synthesized, which displays a large nonlinear optical (NLO) response and melts congruently.
An investigation of new infrared nonlinear optical material: BaCdSnSe4, and three new related centrosymmetric compounds: Ba2SnSe4, Mg2GeSe4, and Ba2Ge2S6.
TLDR
Band structures were calculated and indicate that their tetrahedral units, such as [SnSe4], [GeS4] and [GeSe4, determine the energy band gaps of the title compounds, respectively, which has promising applications in the IR field as a NLO material.
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