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 journalArticlepeer-review

122 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 - 2011 Feb 4
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Enhanced directional dichroism of terahertz light in resonance with magnetic excitations of the multiferroic Ba<sub>2</sub>CoGe<sub>2</sub>O <sub>7</sub> oxide compound'. Together they form a unique fingerprint.

Cite this