Transmission of quantum dot exciton spin states via resonance energy transfer

Gregory D. Scholes, David L. Andrews, Vanessa M. Huxter, Jeongho Kim, Cathy Y. Wong

Research output: Contribution to journalConference article

5 Scopus citations

Abstract

The mechanism of resonance energy transfer between quantum dots is investigated theoretically. In order to incorporate explicit account of the selection rules for absorption of circularly polarized light, a quantum electro-dynamical treatment of the electronic coupling is derived. The electronic coupling is mediated by the exchange of a virtual photon, which in the far zone limit acquires real character and is circularly polarized. The conditions by which quantum information, in terms of exciton spin orientation (total angular momentum quantum number), can be exchanged or switched through resonance energy transfer are discussed. Intrinsic exciton spin flip processes are shown experimentally to compete with typical energy transfer rates. Exciton spin flip times correspondingly range from < 100 fs to 1.2 ps are reported.

Original languageEnglish (US)
Article number59290H
Pages (from-to)1-8
Number of pages8
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume5929
DOIs
StatePublished - Dec 1 2005
Externally publishedYes
EventPhysical Chemistry of Interfaces and Nanomaterials IV - San Diego, CA, United States
Duration: Aug 2 2005Aug 4 2005

Keywords

  • CdSe
  • Exciton spin
  • Optical orientation
  • Quantum dots
  • Resonance energy transfer

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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