弹道非平衡电子的捕获和计数
Trapping and counting ballistic non-equilibrium electrons
摘要：
我们证明了在高磁场中GaAs/AlGaAs异质结中以远高于平衡能量弹道传播的电子的捕获。我们发现沿栅极改性台面边缘的低损耗运输相反，一个有效的衰减多余的能量的循环周围的相邻的，台面限制的节点，使高保真度的捕获。通过单电荷检测测量完整的计数统计数据，可以得出节点内散射（和激发）电子的捕获（和逃逸）概率。能量和到达时间分布的捕获电子波包的特点是调制隧道势垒传输。
英文摘要：
We demonstrate the trapping of electrons propagating ballistically at far-above-equilibrium energies in GaAs/AlGaAs heterostructures in high magnetic field. We find low-loss transport along a gate-modified mesa edge in contrast to an effective decay of excess energy for the loop around a neighboring, mesa-confined node, enabling high-fidelity trapping. Measuring the full counting statistics via single-charge detection yields the trapping (and escape) probabilities of electrons scattered (and excited) within the node. Energetic and arrival-time distributions of captured electron wave packets are characterized by modulating tunnel barrier transmission.
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