Nonreciprocal second harmonic generation in a magnetoelectric material
| Autor: | Naoki Ogawa, Manfred Fiebig, Shingo Toyoda, Taka-hisa Arima, Yoshinori Tokura |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
FOS: Physical sciences
Physics::Optics 02 engineering and technology Interference (wave propagation) 01 natural sciences Condensed Matter::Materials Science 0103 physical sciences Multiferroics 010306 general physics Research Articles Spin-½ Physics Conservation law Condensed Matter - Materials Science Multidisciplinary Condensed matter physics Condensed Matter::Other Second-harmonic generation Nonlinear optics Materials Science (cond-mat.mtrl-sci) SciAdv r-articles Optics 021001 nanoscience & nanotechnology Condensed Matter Physics Magnetic field Amplitude 0210 nano-technology Research Article |
| Zdroj: | Science Advances Science Advances, 7 (16) |
| ISSN: | 2375-2548 |
| DOI: | 10.3929/ethz-b-000481335 |
| Popis: | Mirror symmetries are of particular importance because they are connected to fundamental properties and conservation laws. Spatial inversion and time reversal are typically associated to charge and spin phenomena, respectively. When both are broken, magnetoelectric cross-coupling can arise. In the optical regime, a difference between forward and backward propagation of light may result. Usually, this nonreciprocal response is small. We show that a giant nonreciprocal optical response can occur when transferring from linear to nonlinear optics, specifically second harmonic generation (SHG). CuB2O4 exhibits SHG transmission changes by almost 100% upon reversal of a magnetic field of just ±10 mT. The observed nonreciprocity results from an interference between magnetic-dipole and electric-dipole SHG. Although the former is inherently weaker than the latter, a resonantly enhanced magnetic-dipole transition has a comparable amplitude as a nonresonant electric-dipole transition, thus maximizing the nonreciprocity. Multiferroics and magnetoelectrics are an obvious materials platform to exhibit nonreciprocal nonlinear optical functionalities. Science Advances, 7 (16) ISSN:2375-2548 |
| Databáze: | OpenAIRE |
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