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Ba3Mg3(BO3)3F3 polymorphs with reversible phase transition and high performances as ultraviolet nonlinear optical materials
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Ba3Mg3(BO3)3F3 polymorphs with reversible phase transition and high performances as ultraviolet nonlinear optical materials
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Journal Article
Ba3Mg3(BO3)3F3 polymorphs with reversible phase transition and high performances as ultraviolet nonlinear optical materials
2018
Overview
Nonlinear optical (NLO) materials are the vital components of future photoelectric technologies as they can broaden the tunable wavelength range supplied by common laser sources. However, the necessary prerequisites for a practical NLO material are rather strict. Accordingly, considerable efforts have been focused on finding potential NLO materials. Here we report two asymmetric beryllium-free borates
Pna
2
1
- and
P
6
̄
2
m
-Ba
3
Mg
3
(BO
3
)
3
F
3
featuring NLO-favorable
2
∞
[Mg
3
O
2
F
3
(BO
3
)
2
] layered structures. The reversible phase transition among two polymorphs was demonstrated by multiple experimental tests. The optical measurements reveal that
Pna
2
1
-Ba
3
Mg
3
(BO
3
)
3
F
3
possesses the optical properties required for ultraviolet NLO applications. Remarkably,
Pna
2
1
-Ba
3
Mg
3
(BO
3
)
3
F
3
has a large laser damage threshold, a deep-ultraviolet cutoff edge, a favorable anisotropic thermal expansion as well as the capacity of insolubility in water. These optical properties can be comparable or superior to that of commercial NLO material
β
-BaB
2
O
4
, which make
Pna
2
1
-Ba
3
Mg
3
(BO
3
)
3
F
3
a promising ultraviolet NLO material.
Nonlinear optical crystals suitable for the UV spectral region could simplify short-wavelength generation and make it more efficient. Here, the authors design and demonstrate that one of two asymmetric borate polymorphs exhibits promising optical and mechanical properties for generating UV light.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
