If you want to reproduce the wholeĪrticle in a third-party commercial publication (excluding your thesis/dissertation for which If you are the author of this article, you do not need to request permission to reproduce figuresĪnd diagrams provided correct acknowledgement is given. Provided correct acknowledgement is given. If you are an author contributing to an RSC publication, you do not need to request permission Please go to the Copyright Clearance Center request page. To request permission to reproduce material from this article in a commercial publication, Provided that the correct acknowledgement is given and it is not used for commercial purposes. This article in other publications, without requesting further permission from the RSC, Lin,Ĭreative Commons Attribution-NonCommercial 3.0 Unported Licence. To improve the key properties of nonlinear optical crystals assembled with tetrahedral functional building units This work may afford some inspiration for enhancing the key performances of NLO crystals assembled with non-π-conjugated tetrahedra. It is interesting that ABAF shows vast structural similarities to the typical NLO crystals Sr 2Be 2B 2O 7 (SBBO) and KBe 2BO 3F 2 (KBBF), which might be the partial reason why it showed improvement in these vital properties. Notably, both SHG coefficient and birefringence of ABAF exceeded those of a great majority of phosphates, sulfates, or boron phosphates and achieved a preferable balance. Hence, we investigated for the first time the NLO-related properties of NH 4BAsO 4F (ABAF), which was constructed from tetrahedral and FBUs, and enhancements of these properties were observed in this material, that is large second-harmonic generation (SHG) response (2 × KDP) and improved birefringence (0.03 at 1064 nm). It is currently proposed that partially substituting oxygen atoms with fluoride atoms in these FBUs could enhance these crucial properties. Nonlinear optical (NLO) crystals assembled with conventional non-π-conjugated tetrahedral functional building units (FBUs), generally referring to and, usually exhibit weak nonlinearity and poor birefringence.
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