Ba 4 B 14 O 25 : A Deep Ultraviolet Transparent Nonlinear Optical Crystal with Strong Second Harmonic Generation Response Achieved by a Boron-Rich Closed-Loop Strategy

Discovering new deep ultraviolet (DUV) nonlinear optical (NLO) materials is the current research hotspot. However, how to perfectly integrate several stringent performances into a crystal is a great challenge because of the natural incompatibility among them, particularly wide band gap and large NLO...

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Bibliographic Details
Published in:Small (Weinheim an der Bergstrasse, Germany) Germany), 2024-03, Vol.20 (12), p.e2307072
Main Authors: Xie, Wei-Jie, Tang, Ru-Ling, Yan, Sheng-Nan, Ma, Nan, Hu, Chun-Li, Mao, Jiang-Gao
Format: Article
Language:English
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Summary:Discovering new deep ultraviolet (DUV) nonlinear optical (NLO) materials is the current research hotspot. However, how to perfectly integrate several stringent performances into a crystal is a great challenge because of the natural incompatibility among them, particularly wide band gap and large NLO coefficient. To tackle the challenge, a boron-rich closed-loop strategy is supposed, based on which a new barium borate, Ba B O , is designed and synthesized successfully via the high-temperature solid-state melting method. It features a highly polymeric 3D geometry with the closed-loop anionic framework [B O ] constructed by the fundamental building blocks [B O ] . The high-density π-conjugated [BO ] groups and the fully closed-loop B-O-B connections make Ba B O possess excellent NLO properties, including short UV cutoff edge (
ISSN:1613-6810
1613-6829
DOI:10.1002/smll.202307072