Journal
INORGANIC CHEMISTRY
Volume 60, Issue 22, Pages 16932-16936Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.inorgchem.1c03171
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Funding
- National Science Foundation of China [21771159, 22071212]
- Qinglan Project of Jiangsu Province of China
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Two new noncentrosymmetric crystal materials with laser frequency-doubling activity have been synthesized, showing optical band gaps of 3.72 and 1.78 eV, respectively. These materials provide a new type of IR nonlinear-optical materials.
The indispensable condition for laser frequency-doubling crystal materials is that they crystallize in the noncentrosymmetric (NCS) structures. Here, ternary NCS Ba6In2S10 (1) and Ba6In2Se10 (2) (P6(3)) were synthesized via conventional solid-state reactions. Their zero-dimensional structures feature isolated InQ(4) tetrahedra and Q(2)(2-) (Q = S, Se) dimers that are separated by Ba2+ counter cations. The structural relevance and differences with the centrosymmetric Ba12In4S19 and Ba12In4Se20 are analyzed in detail. Both 1 and 2 show obvious laser frequency-doubling activity, and their optical band gaps are 3.72 and 1.78 eV, respectively. This work provides a new type of IR nonlinear-optical materials.
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