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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42 Citations (Scopus)

Abstract

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
Volume96
Issue number16
DOIs
Publication statusPublished - 2006 May 11
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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