Giant Second Harmonic Generation from Metastable BaTi2O5

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概要

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• 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.

• 2011-04-25

著者

• Masuno Atsunobu

  Institute Of Industrial Science The University Of Tokyo

• Inoue Hiroyuki

  Institute For Chemotherapy M.c.r.e.

• Arai Yasutomo

  ISS Science Project Office, Japan Aerospace Exploration Agency, Tsukuba, Ibaraki 305-8505, Japan

• Kikuchi Yuichi

  Institute of Industrial Science, The University of Tokyo, Meguro, Tokyo 153-8505, Japan

• Yu Jianding

  ISS Science Project Office, Japan Aerospace Exploration Agency, Tsukuba, Ibaraki 305-8505, Japan

• YU Jianding

  ISS Science Project Office, Institute of Space and Astronautical Science (ISAS)

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