期刊
PHYSICAL REVIEW B
卷 92, 期 18, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.92.184409
关键词
-
资金
- Russian Foundation for Basic Research [14-02-91000, 15-02-07647, 14-02-00307, 13-02-12442, 15-42-04186, Sci. school-924.2014.2]
- Austrian Science Fund [I815-N16, I1648-N27, W1243]
- Austrian Science Fund (FWF) [W1243, I1648] Funding Source: Austrian Science Fund (FWF)
One of the most fascinating and counterintuitive recent effects in multiferroics is directional anisotropy, the asymmetry of light propagation with respect to the direction of propagation. In such case the absorption in a material can be different for opposite directions. Besides absorption, different velocities of light for different directions of propagation may be also expected, which is termed directional birefringence. In this work, we demonstrate large directional anisotropy in multiferroic samarium ferroborate. The effect is observed for linear polarization of light in the range of millimeter wavelengths, and it survives down to low frequencies. The dispersion and absorption close to the electromagnon resonance can be controlled by external magnetic field and are fully suppressed in one direction. By changing the geometry of the external field, samarium ferroborate shows giant optical activity, which makes this material a universal tool for optical control: with a magnetic field as an external parameter it allows switching between two functionalities: polarization rotation and directional anisotropy.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据