Volume 83, Number 1, July 2008
Article Number 17003
Number of page(s) 6
Section Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties
Published online 11 June 2008
EPL, 83 (2008) 17003
DOI: 10.1209/0295-5075/83/17003

Lateral shift of far infrared radiation on normal incidence reflection off an antiferromagnet

F. Lima1, 2, T. Dumelow3, 2, J. A. P. da Costa4 and E. L. Albuquerque2

1  Escola Agrícola de Jundaí, Universidade Federal do Rio Grande do Norte - 59280-000 Macaiba-RN, Brazil
2  Departamento de Física, Universidade Federal do Rio Grande do Norte - 59072-970 Natal-RN, Brazil
3  Departamento de Física, Universidade do Estado do Rio Grande do Norte - 59625-620 Mossoró-RN, Brazil
4  Departamento de Física, Universidade Federal do Ceará - 60455-900 Fortaleza-CE, Brazil

received 28 October 2007; accepted in final form 7 May 2008; published July 2008
published online 11 June 2008

A lateral shift, similar to a Goos-Hänchen shift, of a normally incident electromagnetic beam reflected off an antiferromagnet in the presence of an external magnetic field is predicted. This shift is interpreted in terms of nonreciprocity of the reflected phase, and is confirmed using numerical simulation. There is also a lateral displacement of the field within the antiferromagnet, but not of the beam transmitted through an antiferromagnetic slab.

78.20.Ls - Magnetooptical effects.
42.25.Bs - Wave propagation, transmission and absorption.
71.36.+c - Polaritons (including photon-phonon and photon-magnon interactions).

© EPLA 2008