Abstract
AbstractGermanate oxides have been scarcely studied as promising birefringent crystals due to the inherently weak optical anisotropy. Here, a property improvement strategy with synergetic electron distribution and lattice vibration optimization is proposed by introducing tailored functional units of distorted [NbO6] octahedra and antiparallel [GeO4] motifs in germanates. A prospective Cs3Nb5GeO16 (CNGO) crystal exhibits a breakthrough of experimental birefringence (0.19 at 532 nm), the largest value among the available germanate oxides, as well as a wide transparent window and excellent thermal stability up to 1265 °C. Combined density functional theory (DFT) and dipole moment calculations are performed to unveil the underlying physical mechanism of structure–property relationship. These attributes forebode the great potential of CNGO for manipulating polarized light and open a new avenue for innovating birefringent materials with desirable performances.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
