Observation of laser oscillation in aggregates of ultrasmall silicon nanoparticles

M. H. Nayfeh, S. Rao, N. Barry, J. Therrien, G. Belomoin, A. Smith, Sahrawi Chaib

Research output: Contribution to journalArticlepeer-review

116 Scopus citations


We report laser oscillation at ∼610nm in aggregates of ultrasmall elemental Si nanoparticles. The particles are ultrabright red emitting, dispersed from bulk Si by electrochemistry. The aggregates are excited by radiation at 550-570 nm from a mercury lamp. Intense directed Gaussian beams, with a threshold, manifest the emission. We observe line narrowing, and speckle patterns, indicating spatial coherence. This microlasing constitutes an important step towards the realization of a laser on a chip, hence optoelectronics integration and optical interconnects.

Original languageEnglish (US)
Pages (from-to)121-123
Number of pages3
JournalApplied Physics Letters
Issue number1
StatePublished - Jan 7 2002

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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