Linear and Nonlinear Optical constants of BiFeO₃

2008/01/10 by Amit Kumar, R. Rai, Nikolas Podraza +12 · 1 citation
Physics and Astronomy · #cond-mat.mtrl-sci #cond-mat.other

paper · pdf · doi:10.1063/1.2901168

4 pages, 3 figures

arxiv created 2008/01/10 · arxiv updated 2009/12/01

Abstract

Using spectroscopic ellipsometry, the refractive index and absorption versus wavelength of the ferroelectric antiferromagnet Bismuth Ferrite, BiFeO₃ 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 d₁5/d₂2 = 0.20 +/- 0.01, d₃1/d₂2 = 0.35 +/- 0.02, d₃3/d₂2 = -11.4 +/- 0.20 and |d₂2| = 298.4 +/- 6.1 pm/V at a fundamental wavelength of 800 nm.

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