Surface Nonlinear Optics on Centrosymmetric Dirac Nodal-Line Semimetal ZrSiS.,Advanced Materials

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Surface Nonlinear Optics on Centrosymmetric Dirac Nodal-Line Semimetal ZrSiS.
Advanced Materials ( IF 27.4 ) Pub Date : 2019-11-21 , DOI: 10.1002/adma.201904498
Shumeng Chi ₁ , Fei Liang ₂ , Hongxiang Chen ₃ , Wendong Tian ₁ , Han Zhang ₄ , Haohai Yu ₁ , Gang Wang ₃ , Zheshuai Lin ₂ , Jiangping Hu ₃ , Huaijin Zhang ₁

Affiliation

Gapless surface states (SSs) are features of topological semimetals and are extensively observed. Nowadays, the emerging question is whether the SSs possess exotic and applicable properties. Here, associated with the symmetrical selection rule for nonlinear optical materials, the surface nonlinear optics on a centrosymmetric Dirac nodal-line semimetal ZrSiS crystal is studied and it is found that the SSs bring record nonlinear susceptibilities. The unprecedented conversion efficiencies for second and third harmonic generations are 0.11‰ and 0.43‰, respectively, more than ten orders of magnitude larger than the typical surface second harmonic generation. This work discovers a new route toward studying the SSs for applications in nonlinear photonics.

中文翻译：

中心对称Dirac节点线半金属ZrSiS上的表面非线性光学。

无间隙表面状态（SSs）是拓扑半金属的特征，并且得到了广泛的观察。如今，新出现的问题是SS是否具有异国情调和适用的属性。在此，结合非线性光学材料的对称选择规则，研究了中心对称狄拉克节点线半金属ZrSiS晶体上的表面非线性光学，发现SS带来了创纪录的非线性磁化率。二次谐波和三次谐波产生的空前转换效率分别为0.11‰和0.43‰，比典型的表面二次谐波产生大了十个数量级。这项工作为研究SS在非线性光子学中的应用找到了一条新途径。

更新日期：2020-01-15

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