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Enhanced second harmonic generation in a Fdd2 polymorph of C12H8N2O4Zn for UV nonlinear optical applications
Jie Gou1,2, Can Yang2, YunJie Wang1
1Xinjiang Laboratory of Phase Transitions and Microstructures in Condensed Matter Physics, College of Physical Science and Technology, yili-Normal University yi ning, 835000, China. suxin_phy@sina.com.
Abstract:
The quest for novel nonlinear optical (NLO) polymorphs is pivotal for advancing laser technology and frequency conversion applications. We present a detailed study on the synthesis and properties of the Fdd2 polymorph of C12H8N2O4Zn, which exhibits an enhanced second harmonic generation (SHG) effect, 0.3 times that of KDP, nearly 8-fold higher than the P43212 phase. This improvement is attributed to an increased [ZnN2O4] polyhedral stacking angle and structural distortion in the Fdd2 phase. Our findings underscore the importance of polymorphs in optimizing NLO properties and position the Fdd2 phase as a promising candidate for ultraviolet NLO applications.
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