Beryllium‐Free β‐Rb2Al2B2O7 as a Possible Deep‐Ultraviolet Nonlinear Optical Material Replacement for KBe2BO3F2. Issue 11 (31st January 2017)

• Record Type: Journal Article
• Authors: Tran, T. Thao; Koocher, Nathan Z.; Rondinelli, James M.; Halasyamani, P. Shiv
• Is Part Of: Angewandte Chemie international edition. Volume 56:Issue 11(2017)
• Page Start: 2969
• Page End: 2973
• Publication Date: 2017-01-31
• Subjects: borates -- nonlinear optics -- polymorphs -- second harmonic generation -- solid-state structures; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.201612236
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: A new beryllium‐free deep‐ultraviolet (DUV) nonlinear optical (NLO) material, β‐Rb2 Al2 B2 O7 (β‐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×KH2 PO4 and 0.4×β‐BaB2 O4, respectively, and exhibits a short absorption edge below 200 nm. β‐Rb2 Al2 B2 O7 has a three‐dimensional structure of corner‐shared Al(BO3 )3 O polyhedra. The discovery of β‐RABO shows that through careful synthesis and characterization, replacement of KBe2 BO3 F2 (KBBF) by a Be‐free DUV NLO material is possible. Abstract : Nonlinear crystals : A deep‐ultraviolet ( λ <200 nm) nonlinear optical material β‐Rb2 Al2 B2 O7 has been discovered. The material shows second‐harmonic generation at both 1064 and 532 nm, and has an absorption edge below 200 nm. Calculations indicate a birefringence of 0.057 suggesting β‐Rb2 Al2 B2 O7 is phase‐matchable in the deep‐ultraviolet region.