Quantum correlation among photons from a single quantum dot at room temperature

Michler, Peter; İmamoğlu, Ataç; Mason, Michael D.; Carson, Paul J.; Strouse, Geoffrey F.; Buratto, Steven K.

doi:10.1038/35023100

Cited by 916 publications

(766 citation statements)

References 14 publications

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“…with the exciton lifetime τ x and the effective pump rate W [16,17]. Convoluting 1 with the temporal impulse response function of the TCSPS apparatus, involving the instrument time constant τ i , the measured second order autocorrelation function g (2) m (τ ) can be calculated given the three parameters ρ, τ x and τ i by,…”

Section: Resultsmentioning

confidence: 99%

Polarized single photon emission and photon bunching from an InGaN quantum dot on a GaN micropyramid

Jemsson

Machhadani²,

Holtz³

et al. 2015

Nanotechnology

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We report on excitonic single photon emission and biexcitonic photon bunching from an InGaN quantum dot formed on the apex of a hexagonal GaN micropyramid. An approach to suppress uncorrelated emission from the pyramid base is proposed, a metal film is demonstrated to effectively screen background emission and thereby significantly enhance the signal-to-background ratio of the quantum dot emission. As a result, the second order coherence function at zero time delay g (2) (0) is significantly reduced (to g (2) (0) = 0.24, raw value) for the excitonic autocorrelation at a temperature of 12 K under continuous wave excitation, and a dominating single photon emission is demonstrated to survive up to 50 K. The deterioration of the g (2) (0)-value at elevated temperatures is well understood as the combined effect of reduced signal-to-background ratio and limited time resolution of the setup. This result underlines the great potential of site controlled pyramidal dots as sources of fast polarized single photons.

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Section: Resultsmentioning

confidence: 99%

Polarized single photon emission and photon bunching from an InGaN quantum dot on a GaN micropyramid

Jemsson

Machhadani²,

Holtz³

et al. 2015

Nanotechnology

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“…Another possibility is that interactions between the NRs in closest proximity significantly reduce simultaneous emission from multiple NRs within the cluster. Others have previously established that individual NCs are single-photon emitters [26][27][28] . In the future, submicrosecond autocorrelation function (ACFs) measurements of cluster emission, to correlate particle number with the degree of photon antibunching, may clarify further under what circumstances multiple particles within clusters emit independently.…”

Section: Resultsmentioning

confidence: 99%

Collective fluorescence enhancement in nanoparticle clusters

et al. 2011

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many nanoscale systems are known to emit light intermittently under continuous illumination. In the fluorescence of single semiconductor nanoparticles, the distributions of bright and dark periods ('on' and 'off' times) follow Lévy statistics. Although fluorescence from single-quantum dots and from macroscopic quantum dot ensembles has been studied, there has been little study of fluorescence from small ensembles. Here we show that blinking nanorods (nRs) interact with each other in a cluster, and the interactions affect the blinking statistics. The ontimes in the fluorescence of a nR cluster increase dramatically; in a cluster with N nRs, the maximum on-time increases by a factor of N or more compared with the combined signal from N well-separated nRs. our study emphasizes the use of statistical properties in identifying the collective dynamics. The scaling of this interaction-induced increase of on-times with number of nRs reveals a novel collective effect at the nanoscale.

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“…Meanwhile, multi-exciton ionization [9] and direct carrier trapping [10] are the two main channels for the intermittent formation of charged excitons in a single NC, resulting in the photoluminescence (PL) blinking "off" periods [11] that are detrimental to the single-photon emitting characteristics [12] and the brightness of light-emitting diodes [13] normally operated with imbalanced injection of charge carriers.…”

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confidence: 99%

Slow Auger Recombination of Charged Excitons in Nonblinking Perovskite Nanocrystals without Spectral Diffusion

et al. 2016

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Over the last two decades, intensive research efforts have been devoted to the suppressions of photoluminescence (PL) blinking and Auger recombination in metal-chalcogenide nanocrystals (NCs), with significant progresses being made only very recently in several specific heterostructures. Here we show that nonblinking PL is readily available in the newly-synthesized perovskite CsPbI 3 (cesium lead iodide) NCs, and their Auger recombination of charged excitons is greatly slowed down, as signified by a PL lifetime about twice shorter than that of neutral excitons. Moreover, spectral diffusion is completely absent in single CsPbI 3 NCs at the cryogenic temperature, leading to a resolution-limited PL linewidth of ~200 μeV.

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Quantum correlation among photons from a single quantum dot at room temperature

Cited by 916 publications

References 14 publications

Polarized single photon emission and photon bunching from an InGaN quantum dot on a GaN micropyramid

Polarized single photon emission and photon bunching from an InGaN quantum dot on a GaN micropyramid

Collective fluorescence enhancement in nanoparticle clusters

Slow Auger Recombination of Charged Excitons in Nonblinking Perovskite Nanocrystals without Spectral Diffusion

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