NTT Basic Research Laboratories

Latest Topics

Group Topics

Multidisciplinary Materials Design and Science Laboratory
Advanced Applied Physical Science Laboratory
Quantum Science and Technology Laboratory
Nanophotonics Center
Research Center for Theoretical Quantum Physics
March 29, 2001

Manipuration of elementary charge in a Si CCD

Transfer and detection of the elementary charge are demonstrated in an ultrasmall Si charge-coupled device (CCD) at 25K. The device is a closely packed array of two Si-wire MOSFETs. The Si wire is T-shaped so that the electron current through each MOSFET can be measured separately. A single hole is stored and transferred between the two MOSFETs. For the charge detection, a new scheme based on the electron-hole system in the Si nano-wire is used; the stored hole and sensing electrons are kept apart by the large electric field across the Si wire and therefore do not recombine soon.
ref. Nature 410, 560 (2001).

=> Nanodevices Research Group