A 2D Electron Gas for Studies on Tunneling Dynamics and Charge Storage in Self-assembled Quantum Dots

Bastian Marquardt; Hicham Moujib; Axel Lorke; Dirk Reuter; Andreas Wieck; Martin Geller

Quantum Communication and Quantum Networking. First International Conference, QuantumComm 2009, Naples, Italy, October 26-30, 2009, Revised Selected Papers

Research Article

A 2D Electron Gas for Studies on Tunneling Dynamics and Charge Storage in Self-assembled Quantum Dots

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@INPROCEEDINGS{10.1007/978-3-642-11731-2_22,
    author={Bastian Marquardt and Hicham Moujib and Axel Lorke and Dirk Reuter and Andreas Wieck and Martin Geller},
    title={A 2D Electron Gas for Studies on Tunneling Dynamics and Charge Storage in Self-assembled Quantum Dots},
    proceedings={Quantum Communication and Quantum Networking. First International Conference, QuantumComm 2009, Naples, Italy, October 26-30, 2009, Revised Selected Papers},
    proceedings_a={QUANTUMCOMM},
    year={2012},
    month={10},
    keywords={III-V semiconductors indium compounds self-assembly semiconductor quantum dots tunnelling two-dimensional electron gas},
    doi={10.1007/978-3-642-11731-2_22}
}

Bastian Marquardt
Hicham Moujib
Axel Lorke
Dirk Reuter
Andreas Wieck
Martin Geller
Year: 2012
A 2D Electron Gas for Studies on Tunneling Dynamics and Charge Storage in Self-assembled Quantum Dots
QUANTUMCOMM
Springer
DOI: 10.1007/978-3-642-11731-2_22

Bastian Marquardt¹^,*, Hicham Moujib¹, Axel Lorke¹, Dirk Reuter², Andreas Wieck², Martin Geller¹

1: University of Duisburg-Essen
2: Ruhr University Bochum

*Contact email: bastian.marquardt@uni-due.de

Abstract

The carrier tunneling dynamics of self-assembled InAs quantum dots (QD) is studied using time-resolved conductance measurements of a nearby two-dimensional electron gas (2DEG). The coupling strength (tunneling time) between the QDs and the 2DEG is adjusted by different thicknesses of the spacer layers. We demonstrate a strong influence of charged QDs on the conductance on the 2DEG, even for very weak coupling, where standard C-V spectroscopy is unsuitable to investigate the electronic structure of these QDs.

Keywords: III-V semiconductors indium compounds self-assembly semiconductor quantum dots tunnelling two-dimensional electron gas

Published: 2012-10-11

: http://dx.doi.org/10.1007/978-3-642-11731-2_22