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 language | English |
|---|---|
| Article number | 117401 |
| Journal | Physical Review Letters |
| Volume | 110 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - Mar 11 2013 |
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ASJC Scopus subject areas
- Physics and Astronomy(all)
Cite this
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
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TY - JOUR
T1 - Super-poissonian statistics of photon emission from single CdSe-CdS Core-shell nanocrystals coupled to metal nanostructures
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
PY - 2013/3/11
Y1 - 2013/3/11
N2 - 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.
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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U2 - 10.1103/PhysRevLett.110.117401
DO - 10.1103/PhysRevLett.110.117401
M3 - Article
VL - 110
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 11
M1 - 117401
ER -