Linear and nonlinear optical properties of BiFeO3

Amit Kumar*, Ram C. Rai, Nikolas J. Podraza, Sava Denev, Mariola Ramirez, Ying-hao Chu, Lane W. Martin, Jon Ihlefeld, T. Heeg, J. Schubert, Darrell G. Schlom, J. Orenstein, R. Ramesh, Robert W. Collins, Janice L. Musfeldt, Venkatraman Gopalan

*Corresponding author for this work

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Using spectroscopic ellipsometry, the room temperature refractive index and absorption versus wavelength of the ferroelectric antiferromagnet bismuth ferrite, BiFe O3, are 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 pmV at a fundamental wavelength of 800 nm.

Original languageEnglish
Article number121915
JournalApplied Physics Letters
Issue number12
StatePublished - 3 Apr 2008

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