Terahertz magnetic circular dichroism induced by exchange resonance in CoCr2O4 single crystal
Terahertz magnetic circular dichroism induced by exchange resonance in CoCr2O4 single crystal
复制标题
CoCr2O4 单晶中交换共振诱导的太赫兹磁圆二色性
DOI：
10.1364/oe.23.017805
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发表时间：
2015-07-13
期刊：
影响因子：
3.8
通讯作者：
Pi, Li
中科院分区：
文献类型：
--
作者：
Zhang, Peng;Su, Fuhai;Pi, Li
CoCr2O4 单晶的太赫兹 (THz) 时域光谱 (THz-TDS) 已在高达 8 特斯拉的磁场下进行。研究了不同温度下子晶格间交换共振的磁场依赖性。受益于THz-TDS中的相位和偏振敏感检测技术，观察到了太赫兹频率区域的圆吸收二色性和法拉第椭圆率，并且发现它们可以通过外部磁场进行调谐。在不同磁场下获得复折射率，其呈现出由交换磁共振产生的不同旋转色散。 (C) 2015年美国光学学会
Terahertz (THz) time domain spectroscopy (THz-TDS) of a CoCr2O4 single crystal has been performed under magnetic fields up to 8 Tesla. The magnetic field dependences of inter-sublattice exchange resonance at different temperatures have been investigated. Benefiting from the phase and polarization sensitive detection technique in THz-TDS, the circular absorption dichroism and Faraday ellipticity in the THz frequency region are observed and are found to be tunable by the external magnetic field. The complex indices of refraction are obtained under different magnetic field, which present distinct rotatory dispersions arising from the exchange magnetic resonance. (C) 2015 Optical Society of America