Dynamical coherent control of photocurrent in bulk GaAs at room temperature
Dynamical coherent control of photocurrent in bulk GaAs at room temperature
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DOI：
10.1103/physrevb.90.245203
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发表时间：
2014-12
影响因子：
3.7
通讯作者：
H. Tahara;Y. Kanemitsu
中科院分区：
文献类型：
--
作者：
H. Tahara;Y. Kanemitsu
我们报道了室温下亚皮秒动力学中的相干控制光电流。根据锁相脉冲之间的时间间隔，光电流强度呈现出周期性变化。通过测量光电流拍频周期，我们确定了由于浅受主而产生的载流子。非瞬时光电流拍频表达了超快相干动力学，包括光生载流子的退相过程。我们还演示了通过操纵局域态来控制光电流方向。
We report coherently controlled photocurrent at room temperature in subpicosecond dynamics. The photocurrent intensity shows a periodic change depending on the time interval between the phase-locked pulses. We identify the carrier generation due to shallow acceptors in bulk GaAs by measuring the photocurrent beat period. The non-instantaneous photocurrent beat expresses the ultrafast coherent dynamics, including the dephasing process of the photogenerated carriers. We also demonstrate photocurrent direction control through manipulation of the localized states.