Generation of strongly polarization-correlated photon pairs by cascaded emission from individual CdSe/ZnSe quantum dots

S. M. Ulrich, S. Strauf, P. Michler, G. Bacher, A. Forchel

Research output: Contribution to journalArticlepeer-review

Abstract

By combined pulsed auto- and cross-correlation measurements (4 K) on individual self-assembled CdSe quantum dots, besides triggered single photon emission promising for high repetition frequencies, in particular the generation of time-correlated photon pairs from the sequential radiative biexciton-exciton decay is demonstrated. For the photon pairs a strong collinear polarization degree up to 84.5% was observed which is related to an exciton fine-structure splitting. Together with the measured exciton lifetime an estimate for the relaxation time (≥480 ps) between the fine-structure levels is given.

Original languageEnglish
Pages (from-to)607-614
Number of pages8
JournalPhysica Status Solidi (B) Basic Research
Volume238
Issue number3
DOIs
StatePublished - Aug 2003

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