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A new phase-matchable nonlinear optical silicate: Rb2ZnSi3O8

Abstract

Nonlinear optical (NLO) crystals are key materials for generation of coherent light in solid state lasers. A new NLO material Rb2ZnSi3O8 is synthesized by the traditional solid-state reaction technique and its crystals are obtained by spontaneous crystallization using an Rb2O-B2O3 flux. It crystallizes in an asymmetric space group of C2 (No. 5) and features a three-dimensional framework composed of SiO4 and ZnO4 tetrahedra groups. Remarkably, it exhibits a phase-matchable powder second harmonic generation of approximately 2.5 times that of α-SiO2, which is well known to be non-phase-matchble. The first-principle calculations reveal that the Si-O and Zn-O tetrahedra determine the optical properties in the Rb2ZnSi3O8 crystal and may be the origin of the phase matching behavior in Rb2ZnSi3O8. UV-visual-near-infrared diffuse reflectance spectrum shows that Rb2ZnSi3O8 has a wide transparency window down to the deep-UV spectral region. In addition, Rb2ZnSi3O8 is non-hygroscopic. These results suggest that Rb2ZnSi3O8 is a potential deep-UV NLO crystal.

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Publication details

The article was received on 05 Jul 2017, accepted on 22 Sep 2017 and first published on 23 Sep 2017


Article type: Paper
DOI: 10.1039/C7TC03000B
Citation: J. Mater. Chem. C, 2017, Accepted Manuscript
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    A new phase-matchable nonlinear optical silicate: Rb2ZnSi3O8

    B. Zhao, Y. Yang, S. Zhao, Y. Shen, X. Li, L. li, C. Ji, Z. Lin and J. Luo, J. Mater. Chem. C, 2017, Accepted Manuscript , DOI: 10.1039/C7TC03000B

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