Magnetic-field switching of second-harmonic generation in noncentrosymmetric magnet Eu2MnSi2 O7
Journal
Physical Review Materials
Journal Volume
7
Journal Issue
2
Date Issued
2023-02-01
Author(s)
Toyoda, Shingo
Liao, Jiou Cing
Tokunaga, Yusuke
Arima, Taka Hisa
Tokura, Yoshinori
Ogawa, Naoki
Abstract
We report a giant magnetic-field effect on optical second-harmonic generation (SHG) in a noncentrosymmetric ferrimagnet Eu2MnSi2O7. The SHG intensity changes at visible photon energy of 2.8 eV by more than 7000% upon the reversal of magnetic-field direction. Such pronounced modulation of the nonlinear optical activity results from an interference between crystallographic and magnetically induced nonlinear polarization. The amplitude of these nonlinear optical susceptibilities is controlled by the spin alignment and the light incident angle, enabling to optimize the magnetic switching of SHG in detail.
Type
journal article