Landolt-Börnstein - Group III Condensed Matter

HgTe, CdTe, (Cd,Mn)Te, (Cd,Mg)Te, ZnTe, HgSe, CdSe, ZnCdSe, (Cd,Mn)Se, ZnSe, HgS, CdS, ZnS, CdO, ZnO quantum dots -self-organized, epitaxially grown nanostructures

Abstract

This chapter gives a survey about currently known data for three-dimensionally confined excitons in epitaxially grown nanostructures. The results for II-VI semiconductor quantum dots (QDs) grown on and capped with other II-VI semiconductor materials are summarized. Data concerning excitons spatially localized by naturally given, local potential fluctuations such as wellwidth fluctuations in thin quantum wells, are also included. Zero-dimensionality of confined excitons is predominantly proven by optical spectroscopy and only partly supported by structural data. An overview of growth techniques and structural characterization before the data for optical properties are reported. The quasi zero-dimensional exciton state and their fine structure were studied by micro-photoluminescence. Charged excitons, also called trion states, are studied in self-assembled QDs. Trion binding energies obtained in low-temperature single-dot spectroscopy using microphotoluminescence, magneto-photoluminescence and magneto-reflectance are tabulated. The effect of exciton-acoustic-phonon interaction on homogeneous lineshape of confined zero-dimensional excitons is studied for QDs. Modification of optical properties by external fields is described. Coherent dynamics, relaxation and recombination of optical excitations are discussed. The fine structure and polarization properties of the excitons and biexcitons are described. Island sizes, densities and emission energies for CdSe/ZnSe self-assembled QDs are tabulated. Stimulated emission and optical gain for quantum structures are presented.

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Title
HgTe, CdTe, (Cd,Mn)Te, (Cd,Mg)Te, ZnTe, HgSe, CdSe, ZnCdSe, (Cd,Mn)Se, ZnSe, HgS, CdS, ZnS, CdO, ZnO quantum dots -self-organized, epitaxially grown nanostructures
Book Title
Optical Properties. Part 2
In
II-VI Quantum dots II – Self-organized, epitaxially grown nanostructures
Book DOI
10.1007/b98078
Chapter DOI
10.1007/10860224_30
Part of
Landolt-Börnstein - Group III Condensed Matter
Volume
34C2
Editors
  • C. Klingshirn Send Email (10)
  • Editor Affiliation
  • 10 Institut für Angewandte Physik, Universität Karlsruhe (TH), 76131, Karlsruhe, Gemany
  • Authors
  • U. Woggon Send Email (102)
  • Author Affiliation
  • 102 Experimentelle Physik II, Universität Dortmund, 44227, Dortmund, Germany
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