Published in
American Institute of Physics, Applied Physics Letters, 12(92), p. 121915
DOI: 10.1063/1.2901168
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Linear and Nonlinear Optical Properties of BiFeO3
,
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
and other authors.
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Abstract
Using spectroscopic ellipsometry, the room temperature refractive index and absorption versus wavelength of the ferroelectric antiferromagnet bismuth ferrite, Bi Fe O 3 , 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 pm / V at a fundamental wavelength of 800 nm .