Improvement of optical properties of KDP crystals by borax additive

KDP (Potassium dihydrogen phosphate, KH2PO4) single crystals were grown in Borax (Sodium tetraborate decahydrate, Na2B4O7·10H2O or Na2[B4O5(OH)4]·8H2O) added aqueous solutions by the slow cooling method and Sankaranarayanan-Ramasamy (SR) technique. The concentrations of Borax were 0.05, 0.1, 0.5, an...

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Bibliographic Details
Published in:Optical materials 2022-02, Vol.124, p.112014, Article 112014
Main Authors: Phan, Vinh Trung, Nguyen, Khanh Duy, Nguyen, Dong Tran, Anh Le, Tuan Vo, Viet Nguyen, Trung Vo, Tuan Le, Hung Vu
Format: Article
Language:English
Subjects:
Borax
Hydroxyl
KDP
Second harmonic generation
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Summary:KDP (Potassium dihydrogen phosphate, KH2PO4) single crystals were grown in Borax (Sodium tetraborate decahydrate, Na2B4O7·10H2O or Na2[B4O5(OH)4]·8H2O) added aqueous solutions by the slow cooling method and Sankaranarayanan-Ramasamy (SR) technique. The concentrations of Borax were 0.05, 0.1, 0.5, and 1 mol%. Impurities containing hydroxyl (-OH) groups such as Borax can increase the number of hydrogen bonds in KDP crystals, which plays a key role in governing the optical properties of KDP crystals. This comment was proved by the results of the measurements: Ultraviolet–visible (UV–Vis) spectroscopy, Raman spectroscopy, X-ray diffraction (XRD) analysis, and Second Harmonic Generation (SHG). Borax is an important candidate in the current research of impurity-doped KDP crystal for nonlinear optical applications. [Display omitted] •Borax was doped into KDP crystals for the first time•Hydroxyl impurities enhance the optical properties of the crystals•Borax – non-organic hydroxyl impurity – improves SHG efficiency of KDP crystals
ISSN:0925-3467
1873-1252
DOI:10.1016/j.optmat.2022.112014