Current noise spectrum of a single particle emitter: theory and experiment
Current noise spectrum of a single particle emitter: theory and experiment
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单粒子发射器的电流噪声谱：理论与实验
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
M. Buttiker
中科院分区：
文献类型：
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作者：
F. Parmentier;E. Bocquillon;J. Berroir;D. Glattli;Bernard Plaçais;G. Fève;Mathias Albert;C. Flindt;M. Buttiker
相干电子波包的受控和精确发射对于纳米尺度电子学的未来应用至关重要。在这里，我们提出了一个周期性驱动的单电子发射器的有限频率噪声谱的理论和实验分析。电子源由介观电容器组成，介观电容器将单个电子和空穴发射到量子霍尔样品的手性边缘状态中。我们比较实验结果与两个互补的理论描述：一方面，Floquet散射理论，导致在所有相关的操作条件下的噪声谱的准确的数值结果。另一方面，一个半经典的模型，使我们能够开发一个分析描述的主要来源的噪声时，发射器是在最佳条件下操作。我们发现实验和理论之间非常吻合。重要的是，噪声谱为我们提供了一个准确的描述和表征介观电容器作为一个周期性的单电子发射器时。
The controlled and accurate emission of coherent electronic wave packets is of prime importance for future applications of nano-scale electronics. Here we present a theoretical and experimental analysis of the finite-frequency noise spectrum of a periodically driven single electron emitter. The electron source consists of a mesoscopic capacitor that emits single electrons and holes into a chiral edge state of a quantum Hall sample. We compare experimental results with two complementary theoretical descriptions: On one hand, the Floquet scattering theory which leads to accurate numerical results for the noise spectrum under all relevant operating conditions. On the other hand, a semi-classical model which enables us to develop an analytic description of the main sources of noise when the emitter is operated under optimal conditions. We find excellent agreement between experiment and theory. Importantly, the noise spectrum provides us with an accurate description and characterization of the mesoscopic capacitor when operated as a periodic single electron emitter.