Voltage Fluctuation to Current Converter with Coulomb-Coupled Quantum Dots

被引：121

作者：

Hartmann, F. ^{[1
,2
]}

Pfeffer, P. ^{[1
,2
]}

Hoeffling, S. ^{[1
,2
,3
]}

Kamp, M. ^{[1
,2
]}

Worschech, L. ^{[1
,2
]}

机构：

[1] Univ Wurzburg, Tech Phys, Inst Phys, D-97074 Wurzburg, Germany

[2] Wilhelm Conrad Rontgen Res Ctr Complex Mat Syst, D-97074 Wurzburg, Germany

[3] Univ St Andrews, Sch Phys & Astron, SUPA, St Andrews KY16 9SS, Fife, Scotland

来源：

PHYSICAL REVIEW LETTERS | 2015年 / 114卷 / 14期

关键词：

TRANSPORT; DRAG;

D O I：

10.1103/PhysRevLett.114.146805

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the rectification of voltage fluctuations in a system consisting of two Coulomb-coupled quantum dots. The first quantum dot is connected to a reservoir where voltage fluctuations are supplied and the second one is attached to two separate leads via asymmetric and energy-dependent transport barriers. We observe a rectified output current through the second quantum dot depending quadratically on the noise amplitude supplied to the other Coulomb-coupled quantum dot. The current magnitude and direction can be switched by external gates, and maximum output currents are found in the nA region. The rectification delivers output powers in the pW region. Future devices derived from our sample may be applied for energy harvesting on the nanoscale beneficial for autonomous and energy-efficient electronic applications.

引用

页数：5

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