Enhanced optical magnetoelectric effect in a patterned polar ferrimagnet

N. Kida, Y. Kaneko, J. P. He, M. Matsubara, H. Sato, T. Arima, H. Akoh, Y. Tokura

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45 Citations (Scopus)


A simple method to dramatically enhance the optical magnetoelectric (ME) effect, i.e., nonreciprocal directional birefringence, is proposed and demonstrated for a polar ferrimagnet GaFeO3 as a typical example. We patterned a simple grating with a period of 4Îm on a surface of GaFeO3 crystal and used the diffracted light as a probe. The optical ME modulation signal for the Bragg spot of the order n=1 becomes gigantic in the photon energy 1â€"4 eV and reaches 1â€"2% of the bare diffracted light intensity in a magnetic field of 500 Oe. This is amplified by more than 3 orders of magnitude compared to that for the reflection of bulk GaFeO3. Fabricating a photonic crystal will make it possible to lead the way for the practical use of the optical ME effect.

Original languageEnglish
Article number167202
JournalPhysical Review Letters
Issue number16
Publication statusPublished - 2006 May 11
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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