title: Direct observation of magnetochiral effects through a single metamolecule in microwave regions.
abstract: We report direct observation of magnetochiral (MCh) effects for the X-band microwaves through a single metamolecule consisting of a copper chiral structure and ferrite rod. A fictitious interaction between chirality and magnetism is realized in the metamolecule without intrinsic electronic interactions. The MCh effects are induced at the resonant optical activities by applying a weak dc magnetic field of 1 mT, and are increased with the magnetic field. The nonreciprocal differences in refractive indices are evaluated to be 10^{-3} at 200 mT.
authors.affiliation: Graduate School of Materials Science, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara 630-0192, Japan.
authors.forename: Satoshi
authors.initials: S
authors.lastname: Tomita
authors.affiliation: RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo, Hyogo 679-5148, Japan.
authors.forename: Kei
authors.initials: K
authors.lastname: Sawada
authors.affiliation: Department of Electronics, Kyoto Institute of Technology, Matsugasaki, Sakyo, Kyoto 606-8585, Japan.
authors.forename: Andrey
authors.initials: A
authors.lastname: Porokhnyuk
authors.affiliation: Department of Electronics, Kyoto Institute of Technology, Matsugasaki, Sakyo, Kyoto 606-8585, Japan.
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Ueda