Plasmon assisted single photon emission of CdSe/CdS nanocrystals deposited on random gold film

Mallek-Zouari, I.; Buil, Stéphanie; Quélin, Xavier; Mahler, Benoît; Dubertret, Benoît; Hermier, Jean-Pierre

doi:10.1063/1.3467264

Cited by 27 publications

(33 citation statements)

References 16 publications

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“…18 However, in our paper, the crucial role of a spacer played by the thick shell of the NC is demonstrated. In constrast with our previous study 26 concerning CdSe/CdS NCs with a thinner shell (5 nm), no silica spacer is needed to avoid quenching of the fluorescence.…”

Section: A Probability Of Excitationmentioning

confidence: 57%

Strong Purcell effect observed in single thick-shell CdSe/CdS nanocrystals coupled to localized surface plasmons

et al. 2011

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High-quality-factor dielectric cavities designed to a nanoscale accuracy are mostly used to increase the spontaneous emission rate of a single emitter. Here we show that the coupling, at room temperature, between thick-shell CdSe/CdS nanocrystals and random metallic films offers a very promising alternative approach. Optical modes confined at the nanoscale induce strong Purcell factors reaching values as high as 60. Moreover, the quantum emission properties can be tailored: strong antibunching or radiative biexcitonic cascades can be obtained with high photon collection efficiency and extremely reduced blinking.

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Section: A Probability Of Excitationmentioning

confidence: 57%

Strong Purcell effect observed in single thick-shell CdSe/CdS nanocrystals coupled to localized surface plasmons

et al. 2011

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“…Such an approach has been applied with success to colloidal quantum dots known to switch between a neutral and an ionized state with different emission intensities (the fluorescence intensity of the ionized state is lower because the trion can recombine through an Auger process [12,13]). Recently, many authors reported the coupling of colloidal quantum dots to plasmonic structures which enhances the radiative recombinations [14][15][16][17][18][19]. Due to the drastic reduction of Auger recombinations, the radiative quantum efficiency of the ionized and neutral states become very close and cannot be distinguished through their intensity [19].…”

Section: Introductionmentioning

confidence: 98%

Unraveling the time cross correlations of an emitter switching between two states with the same fluorescence intensity

Eloi¹,

Frederich²,

Leray³

et al. 2015

Opt. Express

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The autocorrelation function of the fluorescence intensity of a nanoemitter is measured with the standard Hanbury-Brown and Twiss setup. Time-tagging of the photodetection events during all the experiment has opened new possibilities in terms of post-selection techniques that enable to go beyond the blinking and antibunching characterization. Here, we first present a new method developed to investigate in detail the antibunching of a fluorophore switching between two emitting states. Even if they exhibit the same fluorescence intensity, their respective amount of antibunching can be measured using the gap between their respective decay rates. The method is then applied to a nanoemitter consisting in a colloidal quantum dot coupled to a plasmonic resonator. The relative quantum efficiency of the charged and neutral biexcitons are determined.

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“…Moreover, optical nanoantenna could efficiently interface molecular fluorescent emission and a nanophotonic waveguide [73] with possible applications to realize a platform for quantum optics. In addition, coupling a single photon source to an optical nano-antenna permits to control its emission cadency [74,75,76,77,78,79,80,81,82,83]. Realization of indistiguishable single photons is also a major issue [84,85].…”

Section: Nano-optical Antennasmentioning

confidence: 99%

Plasmonic Purcell factor and coupling efficiency to surface plasmons. Implications for addressing and controlling optical nanosources

Francs

Barthès

Bouhélier

et al. 2016

J. Opt.

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Abstract. The Purcell factor Fp is a key quantity in cavity quantum electrodynamics (cQED) that quantifies the coupling rate between a dipolar emitter and a cavity mode. Its simple form Fp ∝ Q/V unravels the possible strategies to enhance and control light-matter interaction. Practically, efficient light-matter interaction is achieved thanks to either i) high quality factor Q at the basis of cQED or ii) low modal volume V at the basis of nanophotonics and plasmonics. In the last decade, strong efforts have been done to derive a plasmonic Purcell factor in order to transpose cQED concepts to the nanocale, in a scale-law approach. In this work, we discuss the plasmonic Purcell factor for both delocalized (SPP) and localized (LSP) surface-plasmon-polaritons and briefly summarize the expected applications for nanophotonics. On the basis of the SPP resonance shape (Lorentzian or Fano profile), we derive closed form expression for the coupling rate to delocalized plasmons. The quality factor factor and modal confinement of both SPP and LSP are quantified, demonstrating their strongly subwavelength behaviour.

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Plasmon assisted single photon emission of CdSe/CdS nanocrystals deposited on random gold film

Cited by 27 publications

References 16 publications

Strong Purcell effect observed in single thick-shell CdSe/CdS nanocrystals coupled to localized surface plasmons

Strong Purcell effect observed in single thick-shell CdSe/CdS nanocrystals coupled to localized surface plasmons

Unraveling the time cross correlations of an emitter switching between two states with the same fluorescence intensity

Plasmonic Purcell factor and coupling efficiency to surface plasmons. Implications for addressing and controlling optical nanosources

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