An ensemble-based method to assess the quality of a sample of nanocrystals as single photon emitters

Vezzoli, Stefano; Shojaii, J.; Cialdi, S.; Cipriani, Daniele; Castelli, F.; Paris, Matteo G. A.; Carbone, Luigi; Cozzoli, P. Davide; Giacobino, E.; Bramati, Alberto

doi:10.1016/j.optcom.2013.03.020

Cited by 4 publications

(5 citation statements)

References 27 publications

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“…g (2) ≤ 0.44 agree well with the ones observed for single DRs with comparable geometry in literature [16,17]. Therefore, one could conclude that the trapped objects are indeed single DRs.…”

supporting

confidence: 89%

“…The excitation pulse power is chosen such that the DRs are approximately saturated, i.e. on average one exciton is created per excitation pulse [16]. The DRs emit photons at wavelengths about λ DR = 605 nm, which are picked off the excitation and trapping beam path by a reflective short-pass filter that attenuates light at λ trap in reflection.…”

Section: Supplementary Materialsmentioning

confidence: 99%

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Single Photons Emitted by Nanocrystals Optically Trapped in a Deep Parabolic Mirror

et al. 2020

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We investigate the emission of single photons from CdSe/CdS dot-in-rods which are optically trapped in the focus of a deep parabolic mirror. Thanks to this mirror, we are able to image almost the full 4π emission pattern of nanometer-sized elementary dipoles and verify the alignment of the rods within the optical trap. From the motional dynamics of the emitters in the trap we infer that the single-photon emission occurs from clusters comprising several emitters. We demonstrate the optical trapping of rod-shaped quantum emitters in a configuration suitable for efficiently coupling an ensemble of linear dipoles with the electromagnetic field in free space. arXiv:1905.09108v1 [quant-ph]

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supporting

confidence: 89%

Section: Supplementary Materialsmentioning

confidence: 99%

Single Photons Emitted by Nanocrystals Optically Trapped in a Deep Parabolic Mirror

et al. 2020

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“…Noteworthy, in both kinds of measurements one obtains g (2) (0) ≈ 0.2. This imperfect antibunching for a single DR is attributed to a small but finite probability for the recombination of more than one exciton [31]. For delays outside the central anti-bunching dip, the g (2) functions are larger than one.…”

Section: Experimental Realizationmentioning

confidence: 98%

Optical trapping of nanoparticles by full solid-angle focusing

Salakhutdinov

Sondermann

Carbone

et al. 2016

Optica

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Optical dipole-traps are used in various scientific fields, including classical optics, quantum optics and biophysics. Here, we propose and implement a dipole-trap for nanoparticles that is based on focusing from the full solid angle with a deep parabolic mirror. The key aspect is the generation of a linear-dipole mode which is predicted to provide a tight trapping potential. We demonstrate the trapping of rod-shaped nanoparticles and validate the trapping frequencies to be on the order of the expected ones. The described realization of an optical trap is applicable for various other kinds of solid-state targets. The obtained results demonstrate the feasibility of optical dipole-traps which simultaneously provide high trap stiffness and allow for efficient interaction of light and matter in free space.

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“…In the following In the following we call DR2.1 this particular DR from sample DR2. The average number of electron-hole pairs N eh inside the structure was measured to be N eh = 0.5 by a saturation measurement 24 . The bin time is ∆t = 1 ms.…”

Section: Fast Blinking Dynamicsmentioning

confidence: 99%

CdSe/CdS Dot‐in‐Rods Nanocrystals Fast Blinking Dynamics.

et al. 2018

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Analyzing the autocorrelation function of the fluorescence intensity, we demonstrate that these nanoemitters are characterized by a short value of the mean duration of bright periods (ten to a few hundreds of microseconds). The comparison of the results obtained for samples with different geometries shows that not only the shell thickness is crucial but also the shape of the dot-in-rods. Increasing the shell aspect ratio results in shorter bright periods suggesting that surface traps impact the stability of the fluorescence intensity.[a] Dr.

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An ensemble-based method to assess the quality of a sample of nanocrystals as single photon emitters

Cited by 4 publications

References 27 publications

Single Photons Emitted by Nanocrystals Optically Trapped in a Deep Parabolic Mirror

Single Photons Emitted by Nanocrystals Optically Trapped in a Deep Parabolic Mirror

Optical trapping of nanoparticles by full solid-angle focusing

CdSe/CdS Dot‐in‐Rods Nanocrystals Fast Blinking Dynamics.

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