Optical properties of self-assembled II-VI quantum dots

J. K. Furdyna, Sang Hoon Lee

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

We discuss optical properties of self-assembled CdSe-based quantum dots (QDs) studied by photoluminescence (PL), selective PL, PL excitation, and magneto-PL in our laboratory as well as by other groups. Our own QD specimens were fabricated by depositing approximately 3 monolayers of CdSe on ZnSe using MBE. Samples consisting of capped QDs showed intense excitonic transitions from the QD ensemble. The PL spectra were strongly inhomogeneously broadened, but survived to relatively high temperatures without further broadening of the PL line. Selective PL showed clear LO- phonon resonances which - together with the observed temperature stability of the PL band - clearly indicate that the broad band is a superposition of atomic-like spectra emitted by strongly localized excitons. In addition to CdSe QDs on ZnSe, we also studied magneto-PL of QD systems involving diluted magnetic semiconductors (DMSs), in an attempt to determine the degree of exciton localization in the dots. While these experiments are still inconclusive, the results - and particularly the observation of a dramatic magnetic-field-induced enhancement of PL intensity in DMS based systems - are extremely interesting in their own right, and will also be discussed.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Pages774-784
Number of pages11
Volume3283
DOIs
Publication statusPublished - 1998
Externally publishedYes
EventPhysics and Simulation of Optoelectronic Devices VI - San Jose, CA, United States
Duration: 1998 Jan 261998 Jan 26

Other

OtherPhysics and Simulation of Optoelectronic Devices VI
CountryUnited States
CitySan Jose, CA
Period98/1/2698/1/26

Keywords

  • II-VT semiconductors
  • Optical properties
  • Photoluminescence
  • Quantum dots
  • Self-assembling

ASJC Scopus subject areas

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

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  • Cite this

    Furdyna, J. K., & Lee, S. H. (1998). Optical properties of self-assembled II-VI quantum dots. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 3283, pp. 774-784) https://doi.org/10.1117/12.316731