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International Journal of Optics
Volume 2017, Article ID 2980274, 13 pages
Review Article

Langasite Family Midinfrared Nonlinear Optical Oxide Materials: Structure, Property, and Applications

1State Key Laboratory of Crystal Materials and Institute of Crystal Materials, Shandong University, Jinan 250100, China
2Center for Crystal R&D, Key Lab of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China

Correspondence should be addressed to Haohai Yu; nc.ude.uds@uyiahoah

Received 24 July 2017; Accepted 3 October 2017; Published 5 November 2017

Academic Editor: Giulio Cerullo

Copyright © 2017 Haichao Lan et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Midinfrared (IR) nonlinear optical (NLO) materials with high performance are vital in important technological applications in many civil and military fields. Very recently, langasite family compounds have attracted much attention due to their wide transparency to mid-IR region and ultrahigh laser damage threshold (LDT). In this brief review, three important compounds—LGS, LGN, and LGT—are investigated and analyzed based on available experimental data. The electrooptical (EO) Q-switch and mid-IR OPO applications are summarized in detail. Finally, promising search directions for new metal oxides that have good mid-IR NLO performances are discussed.