Energy transfer within ultralow density twin InAs quantum dots grown by droplet epitaxy

ACS Nano. 2008 Nov 25;2(11):2219-24. doi: 10.1021/nn800224p.

Abstract

Ultralow density (approximately 10(6)/cm(2)) of twin InAs quantum dot (QD) hybrid structure was grown by a droplet epitaxy technique. The photoluminescence (PL) from ensemble and individual twin InAs QD structures showed a bimodal behavior and an energy transfer between the well-separated (approximately 190 nm) twin QDs, which was supposedly due to the special wetting ring that built the channel for exciton transfer. This research demonstrates a novel approach to fabricate lateral InAs QD pairs as the candidate for a laterally coupled QD molecule.

Publication types

  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Arsenicals / chemistry*
  • Crystallization / methods*
  • Energy Transfer
  • Indium / chemistry*
  • Materials Testing
  • Microscopy, Atomic Force
  • Models, Chemical
  • Nanostructures / chemistry
  • Nanotechnology / methods*
  • Photochemistry
  • Quantum Dots*
  • Temperature
  • Wettability

Substances

  • Arsenicals
  • Indium
  • indium arsenide