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arXiv 0801.1626cond-mat.mtrl-scicond-mat.other
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BiFeO_3的线性和非线性光学常数

Linear and Nonlinear Optical constants of BiFeO_3

Amit Kumar, R. Rai, Nikolas Podraza, Sava Denev, Mariola Ramirez, Ying-Hao Chu, Jon Ihlefeld, Tassilo Heeg, Jurgen Schubert, Darrell Schlom, Joseph Orenstein, R… 展开作者

Amit Kumar, R. Rai, Nikolas Podraza, Sava Denev, Mariola Ramirez, Ying-Hao Chu, Jon Ihlefeld, Tassilo Heeg, Jurgen Schubert, Darrell Schlom, Joseph Orenstein, R. Ramesh, Robert Collins, Janice Musfeldt, Venkatraman Gopalan

摘要:

本文用椭圆偏振光谱法测量了铁电反铁磁体BiFeO_3的折射率和吸收随波长的变化。该材料在442 nm波长处具有直接带隙(2.81 eV)。使用光学二次谐波产生,在800 nm的基本波长下,非线性光学系数被确定为d_15/d_22 = 0.20 +/- 0.01,d_31/d_22 = 0.35 +/- 0.02,d_33/d_22 = -11.4 +/- 0.20和|d_22| = 298.4 +/- 6.1 pm/V。

英文摘要:

Using spectroscopic ellipsometry, the refractive index and absorption versus wavelength of the ferroelectric antiferromagnet Bismuth Ferrite, BiFeO_3 is reported. The material has a direct band-gap at 442 nm wavelength (2.81 eV). Using optical second harmonic generation, the nonlinear optical coefficients were determined to be d_15/d_22 = 0.20 +/- 0.01, d_31/d_22 = 0.35 +/- 0.02, d_33/d_22 = -11.4 +/- 0.20 and |d_22| = 298.4 +/- 6.1 pm/V at a fundamental wavelength of 800 nm.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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