Enhanced directional dichroism of terahertz light in resonance with magnetic excitations of the multiferroic Ba2CoGe2O 7 oxide compound

I. Kézsmárki, N. Kida, H. Murakawa, S. Bordács, Y. Onose, Y. Tokura

Research output: Contribution to journalArticle

113 Citations (Scopus)

Abstract

We propose that concurrently magnetic and ferroelectric, i.e., multiferroic, compounds endowed with electrically active magnetic excitations (electromagnons) provide a key to producing large directional dichroism for long wavelengths of light. By exploiting the control of ferroelectric polarization and magnetization in a multiferroic oxide Ba2CoGe2O 7, we demonstrate the realization of such a directional light-switch function at terahertz frequencies in resonance with the electromagnon absorption. Our results imply that this hidden potential is present in a broad variety of multiferroics.

Original languageEnglish
Article number057403
JournalPhysical Review Letters
Volume106
Issue number5
DOIs
Publication statusPublished - Feb 4 2011

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dichroism
oxides
excitation
switches
magnetization
polarization
wavelengths

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Enhanced directional dichroism of terahertz light in resonance with magnetic excitations of the multiferroic Ba2CoGe2O 7 oxide compound. / Kézsmárki, I.; Kida, N.; Murakawa, H.; Bordács, S.; Onose, Y.; Tokura, Y.

In: Physical Review Letters, Vol. 106, No. 5, 057403, 04.02.2011.

Research output: Contribution to journalArticle

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