Open AccessMagnetically driven second-harmonic generation with phase matching in MnWO_4
Author(s) -
Naëmi Leo,
Dennis Meier,
Petra Becker,
L. Bohatý,
Manfred Fiebig
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.027700
Subject(s) - second harmonic generation , magnetism , optics , materials science , phase (matter) , nonlinear optics , energy conversion efficiency , high harmonic generation , phase matching , dispersion (optics) , wavelength , sum frequency generation , optoelectronics , physics , condensed matter physics , laser , quantum mechanics
Phase matching is known to enhance the nonlinear optical response in materials with a non-centrosymmetric crystallographic or electronic structure. In contrast, phase-matched frequency doubling driven by non-centrosymmetric magnetism that induces acentricity in otherwise centrosymmetric structures has not been reported yet. In our study we demonstrate the emergence of magnetically driven second-harmonic generation (SHG) with phase matching in MnWO4. The phase-matched wavelength for SHG can be tuned continuously between 450 nm to 630 nm with the conversion efficiency being determined by the refractive indices and their dispersion. Our findings reveal a new strategy towards magnetism-based conversion-materials and a route for controlling the nonlinear signal yield by acting primarily on the material's spin degree of freedom rather than employing its electronic or structural properties.