Radio frequency charge sensing in InAs nanowire double quantum dots

M. Jung; M. D. Schroer; K. D. Petersson; J. R. Petta

doi:10.1063/1.4729469

Radio frequency charge sensing in InAs nanowire double quantum dots

M. Jung
, M. D. Schroer
, K. D. Petersson
, J. R. Petta

Division of Nanotechnology

Princeton University

Research output: Contribution to journal › Article › peer-review

42 Scopus citations

Abstract

We demonstrate charge sensing of an InAs nanowire double quantum dot (DQD) coupled to a radio frequency (rf) circuit. We measure the rf signal reflected by the resonator using homodyne detection. Clear single dot and DQD behavior are observed in the resonator response. rf-reflectometry allows measurements of the DQD charge stability diagram in the few-electron regime even when the dc current through the device is too small to be measured. For a signal-to-noise ratio of one, we estimate a minimum charge detection time of 350 μs at interdot charge transitions and 9 μs for charge transitions with the leads.

Original language	English
Article number	253508
Journal	Applied Physics Letters
Volume	100
Issue number	25
DOIs	https://doi.org/10.1063/1.4729469
State	Published - 18 Jun 2012

Bibliographical note

Funding Information:
Research at Princeton was supported by the Sloan and Packard Foundations, Army Research Office grant W911NF-08-1-0189, DARPA QuEST award HR0011-09-1-0007, and the National Science Foundation through the Princeton Center for Complex Materials, DMR-0819860 and CAREER award, DMR-0846341. Research was carried out in part at the Center for Functional Nanomaterials, Brookhaven National Laboratory, which is supported by DOE BES Contract No. DE-AC02-98CH10886. Partially sponsored by the United States Department of Defense. The views and conclusions contained in this document are those of the authors and should not be interpreted as representing the official policies, either expressly or implied, of the U.S. Government.

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title = "Radio frequency charge sensing in InAs nanowire double quantum dots",

abstract = "We demonstrate charge sensing of an InAs nanowire double quantum dot (DQD) coupled to a radio frequency (rf) circuit. We measure the rf signal reflected by the resonator using homodyne detection. Clear single dot and DQD behavior are observed in the resonator response. rf-reflectometry allows measurements of the DQD charge stability diagram in the few-electron regime even when the dc current through the device is too small to be measured. For a signal-to-noise ratio of one, we estimate a minimum charge detection time of 350 μs at interdot charge transitions and 9 μs for charge transitions with the leads.",

author = "M. Jung and Schroer, \{M. D.\} and Petersson, \{K. D.\} and Petta, \{J. R.\}",

note = "Funding Information: Research at Princeton was supported by the Sloan and Packard Foundations, Army Research Office grant W911NF-08-1-0189, DARPA QuEST award HR0011-09-1-0007, and the National Science Foundation through the Princeton Center for Complex Materials, DMR-0819860 and CAREER award, DMR-0846341. Research was carried out in part at the Center for Functional Nanomaterials, Brookhaven National Laboratory, which is supported by DOE BES Contract No. DE-AC02-98CH10886. Partially sponsored by the United States Department of Defense. The views and conclusions contained in this document are those of the authors and should not be interpreted as representing the official policies, either expressly or implied, of the U.S. Government.",

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doi = "10.1063/1.4729469",

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AU - Schroer, M. D.

AU - Petersson, K. D.

AU - Petta, J. R.

N1 - Funding Information: Research at Princeton was supported by the Sloan and Packard Foundations, Army Research Office grant W911NF-08-1-0189, DARPA QuEST award HR0011-09-1-0007, and the National Science Foundation through the Princeton Center for Complex Materials, DMR-0819860 and CAREER award, DMR-0846341. Research was carried out in part at the Center for Functional Nanomaterials, Brookhaven National Laboratory, which is supported by DOE BES Contract No. DE-AC02-98CH10886. Partially sponsored by the United States Department of Defense. The views and conclusions contained in this document are those of the authors and should not be interpreted as representing the official policies, either expressly or implied, of the U.S. Government.

PY - 2012/6/18

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N2 - We demonstrate charge sensing of an InAs nanowire double quantum dot (DQD) coupled to a radio frequency (rf) circuit. We measure the rf signal reflected by the resonator using homodyne detection. Clear single dot and DQD behavior are observed in the resonator response. rf-reflectometry allows measurements of the DQD charge stability diagram in the few-electron regime even when the dc current through the device is too small to be measured. For a signal-to-noise ratio of one, we estimate a minimum charge detection time of 350 μs at interdot charge transitions and 9 μs for charge transitions with the leads.

AB - We demonstrate charge sensing of an InAs nanowire double quantum dot (DQD) coupled to a radio frequency (rf) circuit. We measure the rf signal reflected by the resonator using homodyne detection. Clear single dot and DQD behavior are observed in the resonator response. rf-reflectometry allows measurements of the DQD charge stability diagram in the few-electron regime even when the dc current through the device is too small to be measured. For a signal-to-noise ratio of one, we estimate a minimum charge detection time of 350 μs at interdot charge transitions and 9 μs for charge transitions with the leads.

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Radio frequency charge sensing in InAs nanowire double quantum dots

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