Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 60, Issue 24, Pages 13574-13578Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202101308
Keywords
deep ultraviolet; diamond-like structure; hydroxycarbonate; nonlinear optics
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Funding
- National Natural Science Foundation of China [11704023, 51802321, 51872297, 51890864]
- Key Laboratory of Functional Crystals and Laser Technology, TIPC, CAS
- Youth Innovation Promotion Association CAS
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This study successfully synthesized the first DUV NLO hydroxycarbonate crystal, LiZn(OH)CO3, with a diamond-like structure as the template for material design, showing excellent performance in wide band gap, second harmonic generation response, and birefringence, as well as unique DUV phase-matching capabilities.
Deep-ultraviolet (DUV) nonlinear optical (NLO) crystals are vital to the development of science and state-of-the-art technologies, but the exploration of these important optoelectronic materials is hindered by the contradiction between NLO effect and energy band gap as well as the sensitivity of DUV phase-matching to optical birefringence. Here, in order to achieve a well balanced DUV NLO performance, we chose the diamond-like structure as the prototype template for the material design and synthesized the first DUV NLO hydroxycarbonate crystal, LiZn(OH)CO3. This compound simultaneously has a wide band gap (>6.53 eV), a strong second harmonic generation response (ca. 3.2xKDP), and a large birefringence (0.147 at 1064 nm) with the shortest DUV phase-matching capability (lambda(PM)<190 nm) among all reported NLO carbonates. Moreover, the structure-property relationships in LiZn(OH)CO3 are analyzed by first-principles calculations. This work presents an effective design strategy to push the NLO performance of hydroxycarbonates into the DUV region.
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