Terahertz time-domain magnetospectroscopy of a high-mobility two-dimensional electron gas.
Terahertz time-domain magnetospectroscopy of a high-mobility two-dimensional electron gas.
复制标题
高迁移率二维电子气的太赫兹时域磁谱。
DOI：
10.1364/ol.32.001845
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发表时间：
2007
期刊：
影响因子：
3.6
通讯作者：
J. Reno
中科院分区：
文献类型：
--
作者：
Xiangfeng Wang;D. Hilton;L. Ren;D. Mittleman;J. Kono;J. Reno
利用太赫兹时域光谱与磁场相结合的技术，在高迁移率GaAs/AlGaAs二维电子气中观察到了回旋共振现象。由此，我们计算出磁导率张量的对角元素的真实的和虚部，这又使我们能够提取样品中电子的浓度、有效质量和散射时间。我们证明了超快太赫兹光谱的实用性，它可以恢复高迁移率（>10（6）cm（2）V（-1）s（-1））样品中的回旋共振的真实线宽，而不受饱和效应的影响。
We have observed cyclotron resonance in a high-mobility GaAs/AlGaAs two-dimensional electron gas by using the techniques of terahertz time-domain spectroscopy combined with magnetic fields. From this, we calculate the real and imaginary parts of the diagonal elements of the magnetoconductivity tensor, which in turn allows us to extract the concentration, effective mass, and scattering time of the electrons in the sample. We demonstrate the utility of ultrafast terahertz spectroscopy, which can recover the true linewidth of cyclotron resonance in a high-mobility (>10(6) cm(2)V(-1)s(-1)) sample without being affected by the saturation effect.