Enhanced directional dichroism of terahertz light in resonance with magnetic excitations of the multiferroic Ba2CoGe2O7 oxide compound

  • 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 Ba2CoGe2O7, 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.

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Metadaten
Author:István KézsmárkiORCiDGND, N. Kida, H. Murakawa, Sándor Bordács, Y. Onose, Y. Tokura
URN:urn:nbn:de:bvb:384-opus4-437235
Frontdoor URLhttps://opus.bibliothek.uni-augsburg.de/opus4/43723
ISSN:0031-9007OPAC
ISSN:1079-7114OPAC
Parent Title (English):Physical Review Letters
Publisher:American Physical Society (APS)
Type:Article
Language:English
Year of first Publication:2011
Publishing Institution:Universität Augsburg
Release Date:2018/11/19
Volume:106
Issue:5
First Page:057403
DOI:https://doi.org/10.1103/physrevlett.106.057403
Institutes:Mathematisch-Naturwissenschaftlich-Technische Fakultät
Mathematisch-Naturwissenschaftlich-Technische Fakultät / Institut für Physik
Mathematisch-Naturwissenschaftlich-Technische Fakultät / Institut für Physik / Lehrstuhl für Experimentalphysik V
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Licence (German):Deutsches Urheberrecht