Na(2)BaMQ(4) (M = Ge, Sn; Q = S, Se): Infrared Nonlinear Optical Materials with Excellent Performances and that Undergo Structural Transformations
Na(2)BaMQ(4) (M = Ge, Sn; Q = S, Se): Infrared Nonlinear Optical Materials with Excellent Performances and that Undergo Structural Transformations
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Na(2)BaMQ(4)（M = Ge、Sn；Q = S、Se）：具有优异性能且可进行结构转变的红外非线性光学材料
DOI：
10.1002/anie.201602317
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Shilie Pan
中科院分区：
文献类型：
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作者：
Kui Wu;Zhihua Yang;Shilie Pan
性能优异的红外非线性光学（IR NLO）材料在激光技术中尤为重要。然而，设计和合成一种有效的红外非线性光学材料，使其光学带隙和非线性光学系数之间达到平衡仍然是一个巨大的挑战。以此为出发点，设计合成了四种新型红外非线性光学材料Na_2BaSnS_4、Na_2BaSnSe_4、Na_2BaGeS_4和Na_2BaGeSe_4。该化合物表现出优异的性质，具有适当的平衡的带隙和NLO系数测量Na2BaSnS4（3.27 eV和约17×KDP，即约17倍的KH2PO4（KDP））和Na2BaGeS4（3.7 eV和约10×KDP），表明该系统满足关键要求作为有前途的IR NLO候选人。 值得注意的是，新的化合物也经历了一个新的结构转变，从四元到三角系统，这是第一次，这已被报道为四元金属硫属化物。
Infrared nonlinear optical (IR NLO) materials with excellent performances are particularly important in laser technology. However, to design and synthesize an efficient IR NLO material with a balance between the optical band gap and the NLO coefficient is still a huge challenge. With this in mind, four new IR NLO materials Na2BaSnS4, Na2BaSnSe4, Na2BaGeS4, and Na2BaGeSe4were successfully designed and synthesized. The compounds exhibit excellent properties with a suitable balance of band gap and NLO coefficient measured for Na2BaSnS4(3.27 eV and about 17×KDP, that is, about 17 times that of KH2PO4(KDP)) and Na2BaGeS4(3.7 eV and about 10×KDP), demonstrating that the systems satisfy the key requirements as promising IR NLO candidates. Remarkably, the new compounds also undergo a novel structural transformation from tetragonal to trigonal systems, the first time that this has been reported for quaternary metal chalcogenides.