Properties of doped and undoped crystals of single domain KTiOAsO4
Properties of doped and undoped crystals of single domain KTiOAsO4
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DOI：
10.1063/1.108953
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发表时间：
1993-01
影响因子：
4
通讯作者：
L. Cheng;L. Cheng;J. Bierlein;F. Zumsteg;A. Ballman
中科院分区：
文献类型：
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作者：
L. Cheng;L. Cheng;J. Bierlein;F. Zumsteg;A. Ballman
使用晶种高温溶液生长技术，从纯砷酸钾自熔剂和钨酸盐熔剂中生长出尺寸高达 35×31×58 mm3（沿 abc）的大型 KTiOAsO4 (KTA) 单晶。在熔体中添加少量 Fe2O3、Sc2O3 或 In2O3 (∼0.2–0.4 wt%)，以促进助熔剂生长晶体中单域的形成。我们在这里报告这些晶体的线性光学和非线性光学特性。我们观察到随着 Fe2O3 掺杂剂浓度 [δ(nz−nx)∼0.017/wt % Fe] 的增加，光学双折射异常强烈。对于 KTA 中约 0.47 wt% 的 Fe 掺杂剂水平，这种增加导致二次谐波产生截止波长蓝移高达 37 nm。
Large single crystals of KTiOAsO4 (KTA) measuring up to 35×31×58 mm3 (along abc) are grown from the pure potassium arsenate self-fluxes and from the tungstate flux using the seeded high-temperature solution growth technique. Small amounts of Fe2O3, Sc2O3, or In2O3 (∼0.2–0.4 wt %) are added to the melt to promote single-domain formation in the flux-grown crystals. We report here the linear optical and nonlinear optical properties of these crystals. We observed an unusually strong optical birefringence increase with Fe2O3 dopant concentration [δ(nz−nx)∼0.017/wt % Fe]. This increase leads to a blue shift in the second-harmonic generation cutoff wavelength of as much as 37 nm for a ∼0.47 wt % Fe-dopant level in KTA.