III–V compounds as single photon emitters

Wang, Xu; Xu, Lei; Jiang, Yun; Yin, Zhouyang; Chan, Christopher C. S.; Deng, Chaoyong; Taylor, Robert A.

doi:10.1088/1674-4926/40/7/071906

Cited by 7 publications

(5 citation statements)

References 142 publications

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“…We found that 50% of our emitters show a very good single photon emission, with g (2) (τ) < 0.2. This result shows a single photon emission quality comparable with other room temperature single photons emitters such as CdS/CdSe dot in rod, 49 InGaN quantum dots, 50 and NV defects in nanodiamonds. 51 We performed a statistical analysis of the g (2) (0) as a function of the central emission wavelength, shown in Figure 6b.…”

Section: Acs Photonicssupporting

confidence: 69%

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

et al. 2020

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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.

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Section: Acs Photonicssupporting

confidence: 69%

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

et al. 2020

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“…Notably, the strong antibunching of Cs 0.2 FA 0.8 PbBr 3 quantum dots indicates single photon emission quality comparable or even higher than room temperature single photon emitters like NV defect centers in diamonds 46 or III−V semiconductor quantum dots. 47 This opens new opportunities for integration of mixed-cation perovskite quantum dots into existing quantum photonic platforms.…”

Section: ■ Conclusionmentioning

confidence: 99%

Color-Tunable Mixed-Cation Perovskite Single Photon Emitters

et al. 2023

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Quantum photonics technologies, like wavelength division multiplexing (WDM), for high-rate quantum key distribution require narrowband, spectrally tunable single photon emitters. Physical methods that rely on the application of large mechanical strain to epitaxial quantum dots or electric and magnetic fields to color centers in 2D metal dichalcogenides provide limited spectral tunability. Here we adopt a chemical approach to synthesize a family of colloidal mixed-cation perovskite quantum dots (Cs 1−x FA x PbBr 3 ) that show highly photostable, compositionally tunable single photon emission at room temperature, spanning more than 30 nm in the visible wavelength spectral range. We find that tailoring the stoichiometry of the organic formamidinium (FA) cation in all-inorganic cesium lead bromide (CsPbBr 3 ) perovskite quantum dots detunes the electronic band structure while preserving their excellent single photon emission characteristics. We argue that the mixed-cation perovskite quantum dots studied in this work offer a new platform for the realization of colortunable single photon emitters that could be readily integrated in a diversity of quantum photonic devices.

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“…Weaker dephasing can also be tailored either via a reduction in the QD size 17 , 18 or the absence of any built-in electric field in zinc-blende III-N QDs 19 , 20 . In addition, III-N QDs remain of utmost relevance for room temperature (RT) SPE applications, where their state of the art III-arsenide counterparts are inoperable 21 . III-N QDs may be particularly well suited for quantum operations that do not require photon indistinguishability 2 , 22 , such as quantum-key distribution 23 , 24 , quantum imaging 25 or quantum metrology 26 .…”

Section: Introductionmentioning

confidence: 99%

Single photon emission and recombination dynamics in self-assembled GaN/AlN quantum dots

et al. 2022

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III-nitride quantum dots (QDs) are a promising system actively studied for their ability to maintain single photon emission up to room temperature. Here, we report on the evolution of the emission properties of self-assembled GaN/AlN QDs for temperatures ranging from 5 to 300 K. We carefully track the photoluminescence of a single QD and measure an optimum single photon purity of g(2)(0) = 0.05 ± 0.02 at 5 K and 0.17 ± 0.08 at 300 K. We complement this study with temperature dependent time-resolved photoluminescence measurements (TRPL) performed on a QD ensemble to further investigate the exciton recombination dynamics of such polar zero-dimensional nanostructures. By comparing our results to past reports, we emphasize the complexity of recombination processes in this system. Instead of the more conventional mono-exponential decay typical of exciton recombination, TRPL transients display a bi-exponential feature with short- and long-lived components that persist in the low excitation regime. From the temperature insensitivity of the long-lived excitonic component, we first discard the interplay of dark-to-bright state refilling in the exciton recombination process. Besides, this temperature-invariance also highlights the absence of nonradiative exciton recombinations, a likely direct consequence of the strong carrier confinement observed in GaN/AlN QDs up to 300 K. Overall, our results support the viability of these dots as a potential single-photon source for quantum applications at room temperature.

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III–V compounds as single photon emitters

Cited by 7 publications

References 142 publications

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

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

Color-Tunable Mixed-Cation Perovskite Single Photon Emitters

Single photon emission and recombination dynamics in self-assembled GaN/AlN quantum dots

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