A flexible functional module to regulate ultraviolet optical nonlinearity for achieving a balance between a second-harmonic generation response and birefringence.

ABSTRACT: Rigid planar π-conjugated groups are adopted for designing ultraviolet (UV) nonlinear optical (NLO) materials extensively. However, for these UV NLO crystals, the realization of a strong second harmonic generation (SHG) response is commonly accompanied by undesired overlarge birefringence. Herein, we propose a new functional gene, the flexible π-conjugated (C₃H₂O₄)^2- group, for designing a UV NLO crystal with a balance between the SHG response and birefringence. Furthermore, the combination of low-coordinated and high-coordinated alkali cations with the flexible (C₃H₂O₄)^2- group results in finding a new mixed alkali malonate, KLi(C₃H₂O₄)·H₂O (KLMW). As expecte

SUBMITTER: Cao L 

PROVIDER: S-EPMC9200121 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature