Metal-enhancement of semiconductor emission in a cadmium selenide-gold nanocomposite.
Published: 2006
Language: eng
Number of pages: 153
ISBN-13: 9780494213049
Description: The optical properties of gold capped nanoscale cadmium selenide (nCdSe-Au) are studied, and the emission found to be enhanced. The enhancement is due to plasmonic propagation of light through the metal. For plasmonic propagation, the metal's dielectric function must be zero at the frequency of interest. In that case field of the propagating light becomes very large. This 'very large' field propagates through the metal and is incident on the semiconductor, raising the semiconductor's emission intensity. In this work nCdSe-Au is synthesized and characterized by scanning transmission microscopy (STEM), optical absorption spectroscopy (OAS) and, photoluminescence spectroscopy (PLS). Confirmation of the enhanced field/plasmonic effect of nanoscale gold on nCdSe emission is made by the PLS observation of certain nCdSe diameters only if gold is present. Their appearance under the influence of gold and their unequal increase follows from phenomena as predicted by Shik and Ruda 1.1H. E. Ruda and A. Shik, Phys. Rev. B,  71, 245328, 2005
Notes: Source: Masters Abstracts International, Volume: 45-03, page: 1631.

Thesis (M.A.Sc.)--University of Toronto, 2006.

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