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

doi:10.1103/PhysRevLett.110.117401

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

Los Alamos National Laboratory

Research output: Contribution to journal › Article › peer-review

51 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 (Q_1X) in freestanding NQDs, Q_2X becomes greater than Q_1X 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 language	English
Article number	117401
Journal	Physical review letters
Volume	110
Issue number	11
DOIs	https://doi.org/10.1103/PhysRevLett.110.117401
Publication status	Published - Mar 11 2013

ASJC Scopus subject areas

Physics and Astronomy(all)

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Super-poissonian statistics of photon emission from single CdSe-CdS Core-shell nanocrystals coupled to metal nanostructures. / Park, Young Shin; Ghosh, Yagnaseni; Chen, Yongfen; Piryatinski, Andrei; Xu, Ping; Mack, Nathan H.; Wang, Hsing Lin; Klimov, Victor I.; Hollingsworth, Jennifer A.; Htoon, Han.

In: Physical review letters, Vol. 110, No. 11, 117401, 11.03.2013.

Research output: Contribution to journal › Article › peer-review

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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.",

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AU - Park, Young Shin

AU - Ghosh, Yagnaseni

AU - Chen, Yongfen

AU - Piryatinski, Andrei

AU - Xu, Ping

AU - Mack, Nathan H.

AU - Wang, Hsing Lin

AU - Klimov, Victor I.

AU - Hollingsworth, Jennifer A.

AU - Htoon, Han

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AB - 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.

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