Investigation of High-Frequency Charge Dynamics in Nanoscale Structures

Abstract

This research has focused on use of a radio-frequency single-electron transistor (RF-SET) to detect the motion of individual electrons in nanostructures such as quantum dots (QDs). During the course of this research we have developed strongly coupled RF-SET/QD system and used them to detect individual electron tunneling events on the dot in a time scale as short as 1 mu s. We have also studied the effects of changes in junction resistance on RF-SET operation and by using reduced junction resistances have developed RF-SETs with improved sensitivity and linearity. We are currently extending these techniques to double quantity dot (DQD) systems, which we intend to use to measure the frequency-resolved back action of the RF-SET. Finally, we are investigating the use of microwave independence matching techniques to optimize the performance of our RF-SETs and minimize the time required for detection of individual electrons.

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Document Details

Document Type
Technical Report
Publication Date
Mar 17, 2005
Accession Number
ADA431655

Entities

People

  • A. J. Rimberg

Organizations

  • Rice University

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Abstracts
  • Bandwidth
  • Classification
  • Detection
  • Electrons
  • Frequency
  • Information Operations
  • Linearity
  • Measurement
  • Military Research
  • Nanostructures
  • Quantum Dots
  • Quantum Tunneling
  • Radio Frequency
  • Resistance
  • Semiconductors
  • Transistors

Fields of Study

  • Physics

Readers

  • Control Systems Engineering.
  • Quantum Dot Semiconductor Device Photonics and Graphene Optoelectronic Materials and THz Physics.

Technology Areas

  • Microelectronics
  • Quantum Computing