arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0809.2727cond-mat.mes-hall
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亚纳秒时域单电子源

Subnanosecond single electron source in the time-domain

Adrien Mahé, François Parmentier, Gwendal Fève, Jean-Marc Berroir, Takis Kontos, A. Cavanna, Bernard Etienne, Yong Jin, Christian Glattli, Bernard Plaçais

摘要:

我们在这里描述的单电子源的实现类似于光学中的单光子源。按需单电子注入是使用经由可变传输的隧道势垒(量子点接触)连接到导体的量子点来获得的。电子发射是由点电位的突然变化触发的,点电位的突然变化在导体中产生高于费米能的单个能级。单个电荷在100 ps至10 ns的平均时间内发射,最终由屏障透明度和点充电能量确定。平均单电子发射过程使用实时快速采集卡以0.5 ns的时间分辨率记录。将单电子信号与基于散射理论的有限激发能模拟结果进行了比较.

英文摘要:

We describe here the realization of a single electron source similar to single photon sources in optics. On-demand single electron injection is obtained using a quantum dot connected to the conductor via a tunnel barrier of variable transmission (quantum point contact). Electron emission is triggered by a sudden change of the dot potential which brings a single energy level above the Fermi energy in the conductor. A single charge is emitted on an average time ranging from 100 ps to 10 ns ultimately determined by the barrier transparency and the dot charging energy. The average single electron emission process is recorded with a 0.5 ns time resolution using a real-time fast acquisition card. Single electron signals are compared tosimulation based on scattering theory approach adapted for finite excitation energies.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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