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

Manceau, Mathieu; Vezzoli, Stefano; Glorieux, Quentin; Giacobino, E.; Carbone, Luigi; Vittorio, Massimo De; Hermier, Jean-Pierre; Bramati, Alberto

doi:10.1002/cphc.201800694

Cited by 8 publications

(12 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A blue line indicates the 0.5 threshold under which the emitter can be regarded as a single photon one. We can also note that the blinking of the emitter creates a bunching effect, that is clearly visible as the peaks at non-zero delay are higher than 1: this kind of effect was previously observed with other types of emitters [9,10].…”

Section: Introductionsupporting

confidence: 74%

“…With our setup we can measure g (2) (τ ) for long values of τ (up to hundreds of ms). This feature allows us to normalize the g (2) function at large delays, taking into account the bunching effect due to the blinking [9]. This effect has to be considered in order to identify the quality of the emitter and it is taken in consideration for the first time for perovskite nanocrystals.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Hybrid devices for quantum nanophotonics

Pierini

D’Amato

Joos

et al. 2020

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

Photons have been identified early on as a very good candidate for quantum technologies applications, as carriers of quantum information, either by polarization encoding, time encoding or spatial encoding. Quantum cryptography, quantum communications, quantum networks and quantum computing are some of the applications targeted by the so called quantum photonics. Nevertheless, it was also clear at an early stage that bulk optics for handling quantum states of light would not be the best option for these technologies. More recently, single photons, entangled photons and quantum light in general have been coupled to integrated approaches coming from classical optics in order to meet the requirements of scalability, reliability and efficiency for quantum technologies. In this article, we describe our recent advances using elongated optical nano-fibers. We also present our latest results on nanocrystals made of perovskites and discuss some of their quantum properties. Finally, we will discuss the general steps necessary in order to couple these nanoemitters efficiently with our photonic platform, based on taperd optical nanofibers.

show abstract

Section: Introductionsupporting

confidence: 74%

Section: Introductionmentioning

confidence: 99%

Hybrid devices for quantum nanophotonics

Pierini

D’Amato

Joos

et al. 2020

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

show abstract

“…We then create a histogram of the relative arrival times of the photons with a time bin of 18 ns, shown in Figure a. Due to the blinking effect, the peaks close to the 0 delay peak are higher than 1; on the other hand the peaks of the autocorrelation function tend to 1 for large delays compared to the characteristics blinking time. The histogram is thus normalized by setting the mean height of the peaks with τ ≈ 10 μs to be 1.…”

Section: Perovskite Nanocube Fabricationmentioning

confidence: 99%

Highly Photostable Perovskite Nanocubes: Toward Integrated Single Photon Sources Based on Tapered Nanofibers

et al. 2020

View full text Add to dashboard Cite

The interest in perovskite nanocrystals (NCs) such as CsPbBr 3 for quantum applications is rapidly raising, as it has been demonstrated that they can behave as very efficient single photon emitters. The main problem to tackle in this context is their photostability under optical excitation. In this article, we present a full analysis of the optical and quantum properties of highly efficient perovskite nanocubes synthesized with an established method, which is used for the first time to produce quantum emitters and is shown to ensure increased photostability. These emitters exhibit reduced blinking together with a strong photon antibunching. Remarkably these features are hardly affected by the increase of the excitation intensity well above the emission saturation levels. Finally, we achieve for the first time the coupling of a single perovskite nanocube with a tapered optical nanofiber in order to aim for a compact integrated single photon source for future applications.

show abstract

“…Single-particle fluorescence studies revealed the mechanism of blinking in a CdSe–CdS tetrapod with CdSe core as Auger-mediated charging and discharging . The role of the shape and thickness of the shell in blinking has been investigated in dot-in-rod CdSe–CdS nanostructures, and the authors report that the increase in the length of the nanostructure deteriorates the bright state stability because of the presence of surface trap states . More recently, PL spectroelectrochemistry-based investigations have revealed that the shallow trap states near the conduction band (CB) edge give rise to nonradiative recombination pathways, regardless of the CdS shell thickness,as evidenced by quenching of the PL.…”

Section: Synthesis and Characterization Of Cdse–cdsmentioning

confidence: 99%

Reasoning the Photoluminescence Blinking in CdSe–CdS Heteronanostructures as Stacking Fault-Based Trap States

2022

View full text Add to dashboard Cite

Minimizing the lattice mismatch of the semiconductor couple (e.g., CdSe/CdS) is an optimal approach for designing defect-free heterojunction nanostructures with bright emission. Spherical core/shell nanocrystals of CdSe/CdS, which can lead to near-unity photoluminescence quantum yields (ϕ PL ), have been well-explored; however, investigations on anisotropic nanostructures are rather limited. Typically, anisotropic shelling proceeds faster with a high possibility of defect state formation. To address this, herein, the photophysical properties of onedimensionally grown CdS on CdSe seeds (CdSe−CdS), having a tapered end, are investigated as a function of shell length. Single-particle photoluminescence intensity studies revealed a decrease in the ON-to-OFF ratio on elongation and established the occurrence of trap-induced Auger processes. The fast growth of the shell results in phase mixinginduced stacking faults in CdS, creating trap states. The existence of these trap states in CdSe−CdS is further ascertained using HRTEM, and their density increases on elongation with a consequent decrease in ensemble ϕ PL and enhanced blinking. The mechanistic insight presented herein provides valuable directives for the design of heteronanostructures with favorable luminescence attributes.

show abstract

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

Cited by 8 publications

References 40 publications

Hybrid devices for quantum nanophotonics

Hybrid devices for quantum nanophotonics

Highly Photostable Perovskite Nanocubes: Toward Integrated Single Photon Sources Based on Tapered Nanofibers

Reasoning the Photoluminescence Blinking in CdSe–CdS Heteronanostructures as Stacking Fault-Based Trap States

Contact Info

Product

Resources

About