Premium
Cs 2 Bi 2 O(Ge 2 O 7 ) (CBGO): A Larger SHG Effect Induced by Synergistic Polarizations of BiO 5 Polyhedra and GeO 4 Tetrahedra
Author(s) -
Tang RuLing,
Hu ChunLi,
Wu BaoLin,
Fang Zhi,
Chen Yan,
Mao JiangGao
Publication year - 2019
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201909735
Subject(s) - germanate , thermal stability , laser , caesium , bismuth , phase (matter) , materials science , metal , crystallography , birefringence , halide , radiation , second harmonic generation , bismuth germanate , analytical chemistry (journal) , chemistry , inorganic chemistry , optics , optoelectronics , doping , physics , organic chemistry , chromatography , metallurgy , scintillator , detector
A cesium bismuth germanate, Cs 2 Bi 2 O(Ge 2 O 7 ) (CBGO), was synthesized by a traditional high‐temperature solid‐state reaction. Its structure features a 3D network composed of a 1D chains composed of Bi 2 O 8 dimers that are further bridged by Ge 2 O 7 dimers, forming tunnels of seven member rings (MRs) that are filled by the Cs + cations. CBGO exhibits extraordinary larger second harmonic generation (SHG) response of about 13.7 times that of KDP (KH 2 PO 4 ) under 1064 nm laser radiation and 1.1 times that of KTP (KTiOPO 4 ) under 2.05 μm laser radiation, which is the highest among all of the metal germanates reported so far. CBGO possesses a moderate birefringence (0.073 at 1064 nm) and is phase matchable. Furthermore, CBGO melts congruently and exhibits high thermal stability.