Cryogenic spectroscopy of ultra-low density colloidal lead chalcogenide   quantum dots on chip-scale optical cavities towards single quantum dot   near-infrared cavity QED
  We present evidence of cavity quantum electrodynamics from a sparse density of strongly quantum-confined Pb-chalcogenide nanocrystals (between 1 and 10) approaching single-dot levels on moderately high-Q mesoscopic silicon optical cavities. Operating at important near-infrared (1500-nm) wavelengths, large enhancements are observed from devices and strong modifications of the QD emission are achieved. Saturation spectroscopy of coupled QDs is observed at 77K, highlighting the modified nanocrystal dynamics for quantum information processing. 
Ranojoy Bose, Jie Gao, James F. McMillan, Alex D. Williams and Chee   Wei Wong