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Surface Nonlinear Optics on Centrosymmetric Dirac Nodal‐Line Semimetal ZrSiS
Author(s) -
Chi Shumeng,
Liang Fei,
Chen Hongxiang,
Tian Wendong,
Zhang Han,
Yu Haohai,
Wang Gang,
Lin Zheshuai,
Hu Jiangping,
Zhang Huaijin
Publication year - 2020
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201904498
Subject(s) - semimetal , dirac (video compression format) , surface (topology) , materials science , second harmonic generation , surface states , photonic crystal , nonlinear optics , gapless playback , line (geometry) , nonlinear system , nonlinear photonic crystal , high harmonic generation , topology (electrical circuits) , photonics , condensed matter physics , optics , band gap , physics , optoelectronics , quantum mechanics , geometry , engineering , laser , mathematics , electrical engineering , neutrino
Abstract 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.