Abstract
Radio-frequency (rf)-operated single-electron transistors (SETs) are high-sensitivity, fast-response electrometers, which are valuable for developing new insights into single-charge dynamics. We investigate high-frequency (up to 1 MHz) charge noise in an AlGaAs/GaAs quantum dot using a transmission-type rf SET technique. The electron capture and emission kinetics on a trap in the vicinity of the quantum dot are dominated by a Poisson process. The maximum bandwidth for measuring single trapping events is about 1 MHz, which is the same as that required for observing single-electron tunneling oscillations in a measurable current (∼0.1 pA).
Original language | English |
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Pages (from-to) | 543-545 |
Number of pages | 3 |
Journal | Applied Physics Letters |
Volume | 77 |
Issue number | 4 |
DOIs | |
Publication status | Published - 2000 Jul 24 |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)