Giant Second Harmonic Generation from Metastable BaTi2O5
Giant Second Harmonic Generation from Metastable BaTi2O5
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DOI：
10.1143/apex.4.042601
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发表时间：
2011-04-01
影响因子：
2.3
通讯作者：
Arai, Yasutomo
中科院分区：
文献类型：
--
作者：
Masuno, Atsunobu;Kikuchi, Yuichi;Arai, Yasutomo
从BaTi2O5玻璃中析出亚稳的α-BaTi2O5晶体时，观察到了巨大的二次谐波。观察到的倍频证实了α-BaTi2O5具有较大的偏振和非中心对称结构。光学异常表明，α-BaTi2O5的极性纳米晶的排列是观测到的巨大介电响应的原因。此外，通过对晶化的α-BaTi2O5进行淬火，可以在室温下获得巨大的SH强度。通过在线监测晶化温度以上的SH强度来评价α-BaTi2O5的热稳定性。这些结果表明，α-BaTi2O5是一种很有前途的光电材料，即使在高温下也是如此。(C)2011年日本应用物理学会
Giant second harmonic generation (SHG) was observed while metastable alpha-BaTi2O5 crystallized from BaTi2O5 glass. The observed SHG confirmed that alpha-BaTi2O5 had a large polarization and a non-centrosymmetric structure. The optical anomaly suggested that the alignment of polar nanocrystals of alpha-BaTi2O5 was the cause of the observed giant dielectric response. Furthermore, the giant SH intensity of alpha-BaTi2O5 could be obtained at room temperature by quenching the crystallized alpha-BaTi2O5. The thermal stability of alpha-BaTi2O5 was evaluated by in situ monitoring of the SH intensity above the crystallization temperature. These results demonstrate that alpha-BaTi2O5 is a promising material for electro-optical applications, even at high temperatures. (C) 2011 The Japan Society of Applied Physics