首页|(162975)Ca-cluster-constructed deep-ultraviolet nonlinear-optical crystal Na_2Ca_(17)Al_2(PO_4)_(14) with strong NLO response
(162975)Ca-cluster-constructed deep-ultraviolet nonlinear-optical crystal Na_2Ca_(17)Al_2(PO_4)_(14) with strong NLO response
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NSTL
Elsevier
Nonlinear-optical (NLO) metal aluminium phosphate crystal materials with deep-ultraviolet (DUV) transparent ability remain greatly unexplored. Herein, mixed alkali/alkaline-earth metal aluminium phosphate DUV NLO crystal Na_2Ca_(17)Al_2(PO_4)_(14) was successfully synthesized through the high-temperature molten technology. Na_2Ca_(17)Al_2(PO_4)_(14) features a 3D Ca-cluster-constructed framework by the stacking of Ca_6O_(36) and (Ca/Na)_3O_(19) clusters, which is filled by isolated A1(PO_4)_6 clusters and isolated PO_4 tetrahedra. Na_2Ca_(17)Al_2(PO_4)_(14) exhibits a short UV absorption edge below 190 nm, phase-matching behavior with strong NLO effect of 0.9 × KDP, high thermal stability. First-principles calculations indicate that the optical properties of Na_2Ca_(17)Al_2(PO_4)_(14) derive primarily from the Ca-O groups, rather than Al-O and P-O traditional groups. The work may further promote the exploration of new DUV NLO aluminium phosphate crystal materials.
Key Laboratory of Magnetic Molecules and Magnetic Information Material of Ministry of Education, School of Chemistry and Material Science, Shanxi Normal University, Linfen 041004, China
Henan Joint International Research Laboratory of Nanocomposite Sensing Materials, School of Chemical and Environmental Engineering, Anyang Institute of Technology, Anyang 455000, China
NSTL
Elsevier
