Authors
Haoran Wang, Haotian Qiu, Chenxu Li, Xue Bai, Qingyu Liu, Zhihua Yang, Min Zhang
Published in
Small (Weinheim an der Bergstrasse, Germany). Pages e76185. Oct 11, 2026. Epub Oct 11, 2026.
Abstract
Large birefringence is a key parameter for nonlinear optical (NLO) and birefringent crystals, as it is critical for extending the phase-matching wavelength of NLO crystals and optimizing the light-splitting performance of birefringent crystals. By rational structural design, two unprecedented functional building blocks (FBBs), [C4H5BO4F] and [C5H7BO4F], were successfully constructed from the newly identified [CH3BO2F] fragment via synergistic fluorination and organic functionalization. A cation-mediated structural engineering approach was employed to achieve four centrosymmetric (CS) compounds (α-KC4H5BO4F, β-KC4H5BO4F, KC5H7BO4F and Na0.5Cs0.5C4H5BO4F) and one noncentrosymmetric (NCS) structure (NaC4H5BO4F). Systematic investigations reveal the unique structure-directing role of Na+, yielding NaC4H5BO4F with a large birefringence (Δn = 0.139 at 1064 nm), strong SHG response (∼1.4 ×KDP) and a short phase-matching wavelength of 208 nm. Additionally, the four CS compounds also exhibit considerable birefringence values of 0.138, 0.121, 0.074 and 0.140 at 1064 nm, respectively. These findings validate the synergistic modification of borate units and cation regulation as a feasible and effective design strategy, providing valuable guidance for the targeted development of high-performance UV NLO materials with large birefringence and shortened phase-matching cutoff wavelengths.
PMID:
42859979
Bibliographic data and abstract were imported from PubMed on 12 Oct 2026.
Read full publication at:
Please sign in
to see all details.
Advertisement
Stats
- Recommendations n/a n/a positive of 0 vote(s)
- Views 4
- Comments 0