The dielectric function of PbS quantum dots in a glass matrix

The dielectric function of PbS quantum dots (Qdots) with diameters of 3.5-5.0 nm in glass matrix is determined from transmission measurements by Maxwell-Garnett effective medium theory combined with iterative Kramers-Kronig analysis. The algorithm used provides real and imaginary part of the dielect...

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Bibliographic Details
Published in:Optical materials express 2012-05, Vol.2 (5), p.496-500
Main Authors: Moreels, Iwan, Kruschke, Detlef, Glas, Peter, Tomm, Jens W.
Format: Article
Language:English
Subjects:
Algorithms
Dielectrics
Effective medium theory
Errors
Glass
Optical materials
Quantum dots
Spectra
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Summary:The dielectric function of PbS quantum dots (Qdots) with diameters of 3.5-5.0 nm in glass matrix is determined from transmission measurements by Maxwell-Garnett effective medium theory combined with iterative Kramers-Kronig analysis. The algorithm used provides real and imaginary part of the dielectric function in the 200-1800 nm spectral range, for both Qdot-doped glasses as well as the PbS Qdots alone. The latter data are compared with the results obtained from colloidal PbS quantum dots and, within the limits of the experimental error, agreement is found.
ISSN:2159-3930
2159-3930
DOI:10.1364/OME.2.000496