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Resonant tunneling through coupled self-assembled quantum dots and the influence of inhomogeneous broadening

In English

Författare

Summary, in English

Resonant tunneling through a single layer of self-assembled quantum dots (QDs) as well as tunneling through two layers of vertically aligned (stacked) dots is investigated. The difference between single and double layers of QDs can be viewed as going from a two-dimensional emitter to a zero-dimensional emitter. By fabricating small-area devices we are able to probe single stacks of quantum dots, revealing details of the coupling between the stacked dots. Very sharp resonances, with peak-to-valley ratios of several hundred, have been measured in the current-voltage characteristics. We also show that the statistical size distribution of self-assembled quantum dots causing the inhomogeneous broadening in luminescence experiments can be analysed in a resonant tunneling experiment

Publiceringsår

2002

Språk

Engelska

Publikation/Tidskrift/Serie

7th International Conference on Nanometer-Scale Science and Technology and 21st European Conference on Surface Science

Dokumenttyp

Konferensbidrag

Förlag

Lund University

Ämne

  • Condensed Matter Physics
  • Electrical Engineering, Electronic Engineering, Information Engineering

Nyckelord

  • resonance
  • stacked dots
  • single stacks
  • small area devices
  • zero-dimensional emitter
  • two-dimensional emitter
  • vertically aligned dots
  • inhomogeneous broadening
  • QD
  • resonant tunneling
  • coupled self-assembled quantum dots
  • peak-valley ratios
  • current-voltage characteristics
  • statistical size distribution
  • luminescence experiments
  • InAs-InP

Conference name

Proceedings of 7th International Conference on Nanometer-Scale Science and Technology and 21st European Conference on Surface Science (NANO-7/ECOSS-21)

Conference date

2002-06-24 - 2002-06-28

Conference place

Malmö, Sweden

Status

Published