Resonant coupling between surface vibrations and electronic states in silicon nanocrystals at the strong confinement regime

A. Sa'ar*, Y. Reichman, M. Dovrat, D. Krapf, J. Jedrzejewski, I. Balberg

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

88 Scopus citations

Abstract

A striking correlation between infrared photoinduced absorption spectra and the photoluminescence from silicon nanocrystals indicates that quantized electronic sublevels of the nanocrystals are resonantly coupled to surface vibrational modes via a polarization field produced by coherent longitudinal polar vibrations. Our experimental results and model support the assumption that the mechanism responsible for the efficient photoluminescence from silicon nanocrystals should be assigned to inhibition of nonradiative channels rather than enhancement of radiative channels.

Original languageAmerican English
Pages (from-to)2443-2447
Number of pages5
JournalNano Letters
Volume5
Issue number12
DOIs
StatePublished - Dec 2005

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