Ultra-low power generation of twin photons in a compact silicon ring resonator

Stefano Azzini*, Davide Grassani, Michael J. Strain, Marc Sorel, L. G. Helt, J. E. Sipe, Marco Liscidini, Matteo Galli, Daniele Bajoni

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

190 Citations (Scopus)


We demonstrate efficient generation of correlated photon pairs by spontaneous four wave mixing in a 5 μm radius silicon ring resonator in the telecom band around 1550 nm. By optically pumping our device with a 200 μWcontinuous wave laser, we obtain a pair generation rate of 0.2 MHz and demonstrate photon time correlations with a coincidence-to-accidental ratio as high as 250. The results are in good agreement with theoretical predictions and show the potential of silicon micro-ring resonators as room temperature sources for integrated quantum optics applications.

Original languageEnglish
Pages (from-to)23100-23107
Number of pages8
JournalOptics Express
Issue number21
Publication statusPublished - 8 Oct 2012
Externally publishedYes


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