Super-poissonian statistics of photon emission from single CdSe-CdS Core-shell nanocrystals coupled to metal nanostructures

Young Shin Park, Yagnaseni Ghosh, Yongfen Chen, Andrei Piryatinski, Ping Xu, Nathan H. Mack, Hsing Lin Wang, Victor I. Klimov, Jennifer A. Hollingsworth, Han Htoon

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50 Citations (Scopus)

Abstract

We demonstrate that photon antibunching observed for individual nanocrystal quantum dots (NQDs) can be transformed into photon bunching characterized by super-Poissonian statistics when they are coupled to metal nanostructures (MNs). This observation indicates that, while the quantum yield of a biexciton (Q 2X) is lower than that of a single exciton (Q1X) in freestanding NQDs, Q2X becomes greater than Q1X in NQDs coupled to MNs. This unique phenomenon is attributed to metal-induced quenching with a rate that scales more slowly with exciton multiplicity than the radiative decay rate and dominates over other nonradiative decay channels for both single excitons and biexcitons.

Original languageEnglish
Article number117401
JournalPhysical review letters
Volume110
Issue number11
DOIs
Publication statusPublished - Mar 11 2013

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Park, Y. S., Ghosh, Y., Chen, Y., Piryatinski, A., Xu, P., Mack, N. H., Wang, H. L., Klimov, V. I., Hollingsworth, J. A., & Htoon, H. (2013). Super-poissonian statistics of photon emission from single CdSe-CdS Core-shell nanocrystals coupled to metal nanostructures. Physical review letters, 110(11), [117401]. https://doi.org/10.1103/PhysRevLett.110.117401