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A New Deep-Ultraviolet Transparent Orthophosphate LiCs2PO4 with Large Second Harmonic Generation Response.

著者 Li L , Wang Y , Lei BH , Han S , Yang Z , Poeppelmeier KR , Pan S
J Am Chem Soc.2016 Jul 12 ; ():.
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LiCs2PO4, a new deep-ultraviolet (UV) transparent material, was synthesized by the flux method. The material contains unusual edge-sharing LiO4-PO4 tetrahedra. It exhibits a very short absorption edge of λ = 174 nm, and generates the largest powder second harmonic generation (SHG) response for deep-UV phosphates that do not contain additional anionic groups, i.e., 2.6 times that of KH2PO4 (KDP). First-principles electronic structure analyses confirm the experimental results and suggest that the strong SHG response may originate from the aligned non-bonding O-2p orbitals. The discovery and characterization of LiCs2PO4 provides a new insight into the structure-property relationships of phosphate-based nonlinear optical materials with large SHG responses and short absorption edges.
PMID: 27403745 [PubMed - as supplied by publisher]
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