BaGeO3 - A Mid-IR Transparent Crystal with Superstrong Raman Response
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2020-02-25 |
| Journal | Inorganic Chemistry |
| Authors | Songming Wan, Yu Zeng, Yanan Yao, Miriding Mutailipu, Jian Han |
| Institutions | Chinese Academy of Sciences, Anhui Institute of Optics and Fine Mechanics |
| Citations | 6 |
Abstract
Section titled āAbstractāStimulated Raman scattering processes based on Raman crystals offer a simple and effective method to generate mid-IR lasers. However, currently available mid-IR Raman crystals are extremely scarce. Herein, a new type of mid-IR Raman crystal, BaGeO<sub>3</sub>, is reported. It crystallizes in the monoclinic space group <i>C</i>2/<i>c</i> with Ba<sup>2+</sup> cations and [Ge<sub>3</sub>O<sub>9</sub>]<sup>6-</sup> rings as basic building units and features high transparency from 2.5 to 5.5 Ī¼m and a Raman response larger than that of diamond. The BaGeO<sub>3</sub> crystal has 45 IR-active modes (22A<sub>u</sub> + 23B<sub>u</sub>) and 42 Raman-active modes (20A<sub>g</sub> + 22B<sub>g</sub>). The wide mid-IR transparent window is attributed to the low phonon energy of the second-order IR-active A<sub>u</sub> ā B<sub>g</sub> mode. The strongest Raman band, located at 799 cm<sup>-1</sup>, arises from the symmetrically stretching vibration of the [Ge<sub>3</sub>O<sub>9</sub>]<sup>6-</sup> extra-ring Ge-O bonds. The findings provide new insights into the crystallographic and Raman spectroscopic characteristics of high-performance mid-IR Raman crystals.
Tech Support
Section titled āTech SupportāOriginal Source
Section titled āOriginal SourceāReferences
Section titled āReferencesā- 2003 - Solid-State Mid-Infrared Laser Sources [Crossref]
- 2003 - Solid-State Mid-Infrared Laser Sources [Crossref]