A bifunctional primitive strategy induces enhancements of large second harmonic generation and wide UV transmittance in rare-earth borates containing [BO] groups

Strong second-harmonic generation (SHG) and a short ultraviolet (UV) cutoff edge are two crucial yet often conflicting parameters that must be finely tuned in the exploration of nonlinear optical (NLO) materials. In this study, two new rare earth borate NLO crystals, K 7 BaSc 2 B 15 O 30 (KBSBO) and...

Full description

Saved in:
Bibliographic Details
Published in:Chemical science (Cambridge) 2024, Vol.15 (23), p.8959-8965
Main Authors: Li, Shuaifeng, Li, Weiming, Li, Xiang, Yang, Guangsai, Ye, Ning, Hu, Zhanggui, Wu, Yicheng, Li, Conggang
Format: Article
Language:English
Subjects:
Borates
Chemistry
Nonlinear optics
Rare earth elements
Second harmonic generation
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Strong second-harmonic generation (SHG) and a short ultraviolet (UV) cutoff edge are two crucial yet often conflicting parameters that must be finely tuned in the exploration of nonlinear optical (NLO) materials. In this study, two new rare earth borate NLO crystals, K 7 BaSc 2 B 15 O 30 (KBSBO) and Rb 21 Sr 3.8 Sc 5.2 B 45 O 90 (RSSBO), were rationally designed through a bifunctional primitive strategy to achieve an optimized balance between favorable SHG efficiency and UV transparency. As anticipated, both KBSBO and RSSBO exhibit a wide UV transparency window below 190 nm. Notably, these tailored crystals display strong SHG responses, with RSSBO achieving a remarkable enhancement in SHG efficiency (2 × KDP), surpassing that of most deep-UV rare earth borates containing [B 5 O 10 ] groups known to date. Theoretical calculations and structural analyses reveal that the impressive SHG activities primarily stem from the [B 5 O 10 ] groups and [ScO 6 ] polyhedra. These findings suggest promising potential for KBSBO and RSSBO crystals as beryllium-free deep UV NLO materials. Strong second-harmonic generation (SHG) and a short ultraviolet (UV) cutoff edge are two crucial yet often conflicting parameters that must be finely tuned in the exploration of nonlinear optical (NLO) materials.
ISSN:2041-6520
2041-6539
DOI:10.1039/d4sc01853b