2025-05-12 東京大学
NiTiO3で観測された電場誘起旋光性
＜関連情報＞
- https://www.t.u-tokyo.ac.jp/press/pr2025-05-12-001
- https://www.t.u-tokyo.ac.jp/hubfs/press-release/2025/0512/001/text.pdf
- https://advanced.onlinelibrary.wiley.com/doi/10.1002/adom.202500364
フェロアクシャルNiTiO3における近赤外波長域での大きな電解効果 Large Electrogyration Effect in Ferroaxial NiTiO3 at Near Infrared Wavelengths
Takeshi Hayashida, Koei Matsumoto, Tsuyoshi Kimura
Advanced Optical Materials Published: 11 May 2025
DOI:https://doi.org/10.1002/adom.202500364
Abstract
The linear electrogyration effect refers to optical rotation induced in proportion to an applied electric field. In comparison with other optical phenomena related to optical rotation, such as natural optical activity and the Faraday effect, the linear electrogyration effect is much less investigated because of the small magnitude of the electric field-induced rotation. In this study, a microscopic mechanism of the linear electrogyration effect is discussed and it is demonstrated that the effect in a ferroaxial crystal NiTiO3 can be significantly pronounced at near infrared wavelengths where the magnetic dipole transitions are strong. Furthermore, it is shown that the effect is amplified in an artificial laminated structure in which the front and back sides of the ferroaxial crystal are laminated alternately with electrodes in between. It is expected this work stimulates further studies on electrogyration and its potential applications.
