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Real-Time Electron Dynamics in Nanoscale Structures A. J. Rimberg, Rice University, DMR-0242907

2 ms/div. 20 µs/div. Real-Time Electron Dynamics in Nanoscale Structures A. J. Rimberg, Rice University, DMR-0242907.

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Real-Time Electron Dynamics in Nanoscale Structures A. J. Rimberg, Rice University, DMR-0242907

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  1. 2 ms/div 20 µs/div Real-Time Electron Dynamics in Nanoscale StructuresA. J. Rimberg, Rice University, DMR-0242907 Electrical currents are a vital part of modern technology, and in particular of electronic devices such as computers. Ultimately, we would like to be able to use individual electrons (rather than a flow of many millions or billions) to carry information. Here we present results in which the motion of individual electrons through a semiconducting quantum dot is detected in a time of about one microsecond. This technique will eventually provide much new information about the behavior of electrons in nanostructures, and may some day be used in readout for quantum information processing. Nature 423, 422 (2003). Single electron transistor (SET) coupled to a semiconductor quantum dot (QD). The SET is used to track the motion of individual electrons in the QD. Real-time output signal of the SET. The sudden changes in the signal correspond to the individual electrons entering or leavind the dot.

  2. Real-Time Electron Dynamics in Nanoscale StructuresA. J. Rimberg, Rice University, DMR-0242907 Education: Four undergraduates (Amanda Whaley, Faisal Amlani, Andrew Blank and Jingyi Lee) and two graduate students (Wei Lu and Zhongqing Ji) contributed to this work. Amanda Whaley was an REU student, and is applying to graduate school this fall. Amlani, Blank and Lee are all currently sophomores at Rice. Wei Lu received his Ph.D. in 2003 and is presently a postdoc at working for Charles Lieber in the Department of Chemistry and Chemical Biology at Harvard University. Zhongqing Ji is still a member of the PIs group and is performing related experiments. Societal Impact: The ability to detect the motion of individual electrons is a very powerful technique, and may lead to the development of new kinds of electronic devices, including quantum computers and new standards for electrical current.

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