New strategy for designing promising mid-infrared nonlinear optical materials: narrowing the band gap for large nonlinear optical efficiencies and reducing the thermal effect for a high laser-induced damage threshold.
New strategy for designing promising mid-infrared nonlinear optical materials: narrowing the band gap for large nonlinear optical efficiencies and reducing the thermal effect for a high laser-induced damage threshold.
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设计有前途的中红外非线性光学材料的新策略：缩小带隙以获得大的非线性光学效率并减少热效应以获得高激光诱导损伤阈值
DOI：
10.1039/c8sc01210e
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发表时间：
2018-07-14
期刊：
影响因子：
8.4
通讯作者：
Guo GC
中科院分区：
文献类型：
--
作者：
Li SF;Jiang XM;Fan YH;Liu BW;Zeng HY;Guo GC
验证了一种新的策略，寻找实用的红外非线性光学材料不受限制的NLO-LIDT不兼容。为了克服中红外非线性光学（NLO）材料的高非线性光学（NLO）效率和高激光损伤阈值（LIDT）之间的不相容性，提出了一种设计同时具有这两种优异性能的材料的新策略。该策略涉及使带隙变窄以获得大的NLO效率，并降低热效应以获得高的LIDT。为了支持这些建议，一系列同构的硫属元素化物与各种四面体中心阳离子，Na_2Ga_2 MQ_6（M = Ge，Sn; Q = S，Se），合成和详细研究。与基准的AGS相比，这些硫族化合物表现出明显更窄的带隙（1.56-1.73 eV，AGS：2.62 eV）和高NLO效率（1910 nm时为AGS的1.6-3.9倍），以及8.5-13.3倍于AGS的出色LIDT，适用于潜在的高功率应用，这与传统的带隙观点相反，但可以归因于它们的小的热膨胀各向异性，克服了NLO-LIDT不相容性。这些结果为寻找不受NLO-LIDT不相容性限制的具有优异性能的实用红外非线性光学材料提供了依据。
A new strategy towards the search for practical IR NLO materials not restricted by the NLO–LIDT incompatibility is verified. To circumvent the incompatibility between large nonlinear optical (NLO) efficiencies and high laser-induced damage thresholds (LIDTs) in mid-infrared NLO materials, a new strategy for designing materials with both excellent properties is proposed. This strategy involves narrowing the band gap for large NLO efficiencies and reducing the thermal effect for a high LIDT. To support these proposals, a series of isostructural chalcogenides with various tetrahedral center cations, Na2Ga2MQ6 (M = Ge, Sn; Q = S, Se), were synthesized and studied in detail. Compared with the benchmark AGS, these chalcogenides exhibit significantly narrower band gaps (1.56–1.73 eV, AGS: 2.62 eV) and high NLO efficiencies (1.6–3.9 times that of AGS at 1910 nm), and also outstanding LIDTs of 8.5–13.3 × those of AGS for potential high-power applications, which are contrary to the conventional band gap view but can be attributed to their small thermal expansion anisotropy, surmounting the NLO–LIDT incompatibility. These results shed light on the search for practical IR NLO materials with excellent performance not restricted by NLO–LIDT incompatibility.
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影响因子：
8.6
作者：
Haynes, Alyssa S.;Saouma, Felix O.;Kanatzidis, Mercouri G.
通讯作者：
Kanatzidis, Mercouri G.
DOI：
10.1002/pssa.2210910218
发表时间：
1985-01-01
期刊：
PHYSICA STATUS SOLIDI A-APPLIED RESEARCH
影响因子：
--
作者：
BODNAR, IV;ORLOVA, NS
通讯作者：
ORLOVA, NS
影响因子：
3.3
作者：
Chung, In;Song, Jung-Hwan;Kanatzidis, Mercouri G.
通讯作者：
Kanatzidis, Mercouri G.
影响因子：
3.7
作者：
JAYARAMAN, A;NARAYANAMURTI, V;MAINES, RG
通讯作者：
MAINES, RG
影响因子：
64.8
作者：
CHEN, CT;WANG, YB;YU, LH
通讯作者：
YU, LH