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Effect of charging on CdSe/CdS dot-in-rods single-photon emission (Articolo in rivista)

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Effect of charging on CdSe/CdS dot-in-rods single-photon emission (Articolo in rivista) (literal)

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Manceau M.[ 1 ] ; Vezzoli S.[ 1,2 ]; Glorieux Q.[ 1 ]; Pisanello F.[ 3 ]; Giacobino E.[ 1 ]; Carbone L.[ 4 ]; De Vittorio M.[ 3,4 ]; Bramati A.[ 1 ] (2014)
Effect of charging on CdSe/CdS dot-in-rods single-photon emission
in Physical review. B, Condensed matter and materials physics; AMER CHEMICAL SOC, WASHINGTON (Stati Uniti d'America)
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Manceau M.[ 1 ] ; Vezzoli S.[ 1,2 ]; Glorieux Q.[ 1 ]; Pisanello F.[ 3 ]; Giacobino E.[ 1 ]; Carbone L.[ 4 ]; De Vittorio M.[ 3,4 ]; Bramati A.[ 1 ] (literal)

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[ 1 ] Univ Paris 06, CNRS, Ecole Normale Super, Lab Kastler Brossel,UMR 8552, F-75252 Paris 05, France [ 2 ] Nanyang Technol Univ, CDPT, SPMS, Singapore 639798, Singapore [ 3 ] IIT, Ctr Biomol Nanotechnol, I-73010 Lecce, Italy [ 4 ] Univ Salento, CNR, Ist Nanosci, NNL, I-73100 Lecce, Italy (literal)

Titolo

Abstract

The photon statistics of CdSe/CdS dot-in-rods nanocrystals is studied with a method involving postselection of the photon detection events based on the photoluminescence count rate. We show that flickering between two states needs to be taken into account to interpret the single-photon emission properties. With postselection we are able to identify two emitting states: the exciton and the charged exciton (trion), characterized by different lifetimes and different second-order correlation functions. Measurements of the second-order autocorrelation function at zero delay with postselection shows a degradation of the single-photon emission for CdSe/CdS dot-in-rods in a charged state that we explain by deriving the neutral and charged biexciton quantum yields. © 2014 American Physical Society. (literal)

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