Optical and magneto-optical behavior of Cerium Yttrium Iron Garnet thin films at wavelengths of 200–1770 nm
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Onbasli-2016-Optical and magneto.pdf
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Author(s)
Beran, Lukáš
Zahradník, Martin
Kučera, Miroslav
Antoš, Roman
Mistrík, Jan
Veis, Martin
Onbasli, Mehmet Cengiz
Dionne, Gerald F.
Ross, Caroline A
Date Issued
March 2016
Journal
Scientific Reports
Publisher
Nature Publishing Group
Citation
Onbasli, Mehmet C., Lukáš Beran, Martin Zahradník, Miroslav Kučera, Roman Antoš, Jan Mistrík, Gerald F. Dionne, Martin Veis, and Caroline A. Ross. “Optical and Magneto-Optical Behavior of Cerium Yttrium Iron Garnet Thin Films at Wavelengths of 200–1770 Nm.” Scientific Reports 6 (March 30, 2016): 23640. © 2017 Macmillan Publishers Limited
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Final published version
Abstract
Magneto-optical cerium-substituted yttrium iron garnet (Ce:YIG) thin films display Faraday and Kerr rotation (rotation of light polarisation upon transmission and reflection, respectively) as well as a nonreciprocal phase shift due to their non-zero off-diagonal permittivity tensor elements, and also possess low optical absorption in the near-infrared. These properties make Ce:YIG useful in providing nonreciprocal light propagation in integrated photonic circuits, which is essential for accomplishing energy-efficient photonic computation and data transport architectures. In this study, 80 nm-thick Ce:YIG films were grown on Gadolinium Gallium Garnet substrates with (100), (110) and (111) orientations using pulsed laser deposition. The films had bulk-like structural and magnetic quality. Faraday and Kerr spectroscopies along with spectroscopic ellipsometry were used to deduce the complete permittivity tensor of the films in the ultraviolet, visible and near-infrared spectral region, and the magneto-optical figure of merit as a function of wavelength was determined. The samples showed the highest IR Faraday rotation reported for thin films of Ce:YIG, which indicates the importance of this material in development of nonreciprocal photonic devices.
MIT Department
Lincoln Laboratory
Massachusetts Institute of Technology. Department of Materials Science and Engineering
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DOI of Published Version
https://doi.org/10.1038/srep23640
