Beryllium-Free beta-Rb2Al2B2O7 as a Possible Deep-Ultraviolet Nonlinear Optical Material Replacement for KBe2BO3F2

摘要

A new beryllium-free deep-ultraviolet (DUV) nonlinear optical (NLO) material, beta-Rb2Al2B2O7 (beta-RABO), has been synthesized and characterized. The chiral nonpolar acentric material shows second-harmonic generation (SHG) activity at both 1064 and 532 nm with efficiencies of 2 X KH2PO4 and 0.4 X beta-BaB2O4, respectively, and exhibits a short absorption edge below 200 nm. beta-Rb2Al2B2O7 has a three-dimensional structure of corner-shared Al(BO3)(3)O polyhedra. The discovery of beta-RABO shows that through careful synthesis and characterization, replacement of KBe2BO3F2 (KBBF) by a Be-free DUV NLO material is possible.