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

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceeding

Abstract

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

Details

Authors
Organisations
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

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

Keywords

  • 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
Original languageEnglish
Title of host publication7th International Conference on Nanometer-Scale Science and Technology and 21st European Conference on Surface Science
PublisherLund University
Number of pages2
Publication statusPublished - 2002
Publication categoryResearch
Peer-reviewedYes
EventProceedings of 7th International Conference on Nanometer-Scale Science and Technology and 21st European Conference on Surface Science (NANO-7/ECOSS-21) - Malmö, Sweden
Duration: 2002 Jun 242002 Jun 28

Conference

ConferenceProceedings of 7th International Conference on Nanometer-Scale Science and Technology and 21st European Conference on Surface Science (NANO-7/ECOSS-21)
CountrySweden
CityMalmö
Period2002/06/242002/06/28