期刊
CHEMISTRY OF MATERIALS
卷 28, 期 7, 页码 2301-2307出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.chemmater.6b00360
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资金
- National Natural Science Foundation of China [91222204, 51425205]
- Main Direction Program of Knowledge Innovation of Chinese Academy of Sciences [KJCX2-EW-H03-03]
- Special Project of National Major Scientific Equipment Development of China [2012YQ120060]
It is a great challenge to explore deep-ultraviolet (deep-UV) nonlinear optical (NLO) materials that can achieve a subtle balance among large nonlinear coefficients, moderate birefringence, and deep-ultraviolet (UV) transparency. A new beryllium-free fluoride carbonate Ca2Na3(CO3)(3)F was successfully synthesized through molecular engineering design, and large single crystals were grown by spontaneous crystallization with molten fluxes. The substitution of NLO-active [BO3] groups for [CO3] groups resulted in an optimal balance among the SHG coefficient, birefringence, and UV transparency. Via comparison of these two iso-structural compounds, the second-harmonic generation coefficients and birefringence of Ca2Na3(CO3)(3)F have been greatly improved. Remarkably, Ca2Na3(CO3)(3)F exhibited a wide transparent region with a deep-UV absorption edge at 190 nm. These results demo material in the UV or deep-UV region.
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