AZn4Ga5Se12 (A = K, Rb, or Cs) - Infrared Nonlinear Optical Materials with Simultaneous Large Second Harmonic Generation Responses and High Laser-Induced Damage Thresholds
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2021-06-17 |
| Journal | Inorganic Chemistry |
| Authors | Man Chen, Shenghua Zhou, Wenbo Wei, Xintao Wu, Hua Lin |
| Institutions | Tan Kah Kee Innovation Laboratory, Fujian Institute of Research on the Structure of Matter |
| Citations | 28 |
Abstract
Section titled āAbstractāDespite the fact that nonlinear optical (NLO) crystals such as AgGaS<sub>2</sub> and AgGaSe<sub>2</sub> have been widely used in the infrared (IR) range due to their large second harmonic generation (SHG) coefficients and wide range of IR transparency windows, the small laser-induced damage threshold (LIDT) remains a great issue hindering their high-power applications. Herein, three noncentrosymmetric (NCS) chalcogenides AZn<sub>4</sub>Ga<sub>5</sub>Se<sub>12</sub> (A = K, Rb, or Cs) are successfully obtained through an appropriate flux method after the extensive design and synthesis of the A/Zn/Ga/Q system. Single-crystal X-ray diffraction data demonstrate that they adopt trigonal space group <i>R</i>3 (No. 146) with three-dimensional diamond-like frameworks composed of [M<sub>9</sub>Se<sub>24</sub>] layers (M = Zn or Ga) stacking in the same direction and filled by charge-balancing A<sup>+</sup> cations. Noticeably, they all exhibit strong powder SHG responses (2.8-3.7 Ć AgGaS<sub>2</sub>) and amazing LIDTs (19.2-23.4 Ć AgGaS<sub>2</sub>). In addition, theoretical calculations are performed to further determine the relationship between NCS structures and NLO properties. This work provides effective solutions for overcoming the trade-off between strong SHG and high LIDT in IR-NLO materials.
Tech Support
Section titled āTech SupportāOriginal Source
Section titled āOriginal SourceāReferences
Section titled āReferencesā- 2005 - Nonlinear Optical Crystals: A Complete Survey
- 2008 - Tunable Laser Applications [Crossref]