As the system where both space-inversion and time-reversal symmetries are broken simultaneously, the authors have investigated an Er3+-doped ferroelectric (Ba, Sr)TiO3 single crystal under magnetic field, in which the luminescent magnetic Er3+ ion occupies a noncentrosymmetric site. The k-directional dichroism, termed the optical magnetoelectric (OME) effect, was verified in the 4I13/2→4I15/2 emission (λ ∼ 1.55 μm) by the reversal of magnetic field and spontaneous polarization. The observed nonreciprocity ΔI/I∼0.5% at 3000 Oe implies the possibility of the application of the OME effect to the function of an optical isolator.
|Journal||Applied Physics Letters|
|Publication status||Published - 2006|
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)