Journal
CHEMICAL COMMUNICATIONS
Volume 58, Issue 79, Pages 11167-11170Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2cc03979f
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Funding
- National Natural Science Foundation of China [22175190, 51890862]
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A novel IR NLO oxytelluride Sr3Ge2O4Te3 was successfully designed and synthesized through a partial substitution strategy. Compared with the parent oxide, it exhibits improved performances, including a wide band gap, strong SHG response, and large optical anisotropy.
Herein, a novel IR NLO oxytelluride Sr3Ge2O4Te3 was successfully designed and synthesized through a partial O-to-Te substitution strategy. Compared with the parent oxide, Sr3Ge2O4Te3 not only successfully achieves a phase-matchability transition (from NPM to PM), but also greatly improves the linear and NLO performances, including a wide band gap (2.26 eV), strong SHG response (1.3 x AgGaSe2) and large optical anisotropy (Delta n = 0.152@2090 nm). The analyses of the structure-property relationship and SHG-density indicate that the bridging oxygen in the [O3Ge-O-GeTe3] prism unit plays the most important role in the multiplication SHG effect. This work provides some insights into the design and exploration of novel IR NLO materials.
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