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Cryogenic spectroscopy of ultra-low density colloidal lead chalcogenide quantum dots on chip-scale optical cavities towards single quantum dot near-infrared cavity QED

  • Ranojoy Bose
  • , Jie Gao
  • , James F. McMillan
  • , Alex D. Williams
  • , Chee Wei Wong
  • Columbia University

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

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.

Original languageEnglish
Pages (from-to)22474-22483
Number of pages10
JournalOptics Express
Volume17
Issue number25
DOIs
StatePublished - Dec 7 2009

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