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Published March 26, 2006 | Published
Journal Article Open

Spectral tuning of plasmon-enhanced silicon quantum dot luminescence


In the presence of nanoscale silver island arrays, silicon quantum dots exhibit up to sevenfold luminescence enhancements at emission frequencies that correspond to the collective dipole plasmon resonance frequency of the Ag island array. Using electron-beam lithography to alter the pitch and particle diameter, this wavelength-selective enhancement can be varied as the metal array resonance wavelength is tuned from 600 to 900 nm. The luminescence intensity enhancement upon coupling is attributed to an increase in the radiative decay rate of the silicon quantum dots.

Additional Information

© 2006 American Institute of Physics (Received 9 November 2005; accepted 16 February 2006; published online 31 March 2006) Work at AMOLF is part of the research program of FOM, supported by NOW and NANONED, a nanotechnology program of the Dutch Ministry of Economic Affairs. Sample fabrication and characterization were done at the Amsterdam nanoCenter. This work was also partially supported by NSF Grant No. CHE-0213589 and by AFOSR MURI Award No. FA9550-04-1-0434. One of the authors (H.A.A.) acknowledges the support of a Joop Los Fellowship awarded by AMOLF.

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