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Nearly blinking-free, high-purity single-photon emission by colloidal InP/ZnSe quantum dots

Vigneshwaran Chandrasekaran (UGent) , Mickaël Tessier (UGent) , Dorian Dupont (UGent) , Pieter Geiregat (UGent) , Zeger Hens (UGent) and Edouard Brainis (UGent)
(2017) NANO LETTERS. 17(10). p.6104-6109
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Center for nano- and biophotonics (NB-Photonics)
Abstract
Colloidal core/shell InP/ZnSe quantum dots (QDs), recently produced using an improved synthesis method, have a great potential in life-science applications as well as in integrated quantum photonics and quantum information processing as single-photon emitters. Single particle spectroscopy of 10 nm QDs with 3.2 nm cores reveals strong photon antibunching attributed to fast (70 ps) Auger recombination of multiple excitons. The QDs exhibit very good photostability under strong optical excitation. We demonstrate that the antibunching is preserved when the QDs are excited above the saturation intensity of the fundamental-exciton transition. This result paves the way toward their usage as high-purity on-demand single-photon emitters at room temperature. Unconventionally, despite the strong Auger blockade mechanism, InP/ZnSe QDs also display very little luminescence intermittency ("blinking"), with a simple on/off blinking pattern. The analysis of single-particle luminescence statistics places these InP/ZnSe QDs in the class of nearly blinking free QDs, with emission stability comparable to state-of-the-art thick-shell and alloyed-interface CdSe/CdS, but with improved single-photon purity.
Keywords
Colloidal quantum dots, single-particle, spectroscopy, single-photon emission, blinking, ROOM-TEMPERATURE, FLUORESCENCE INTERMITTENCY, SUPPRESSED BLINKING, AUGER RECOMBINATION, NANOCRYSTALS, GENERATION, LINEWIDTHS, INTERFACE, EFFICIENT, EMITTERS

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Citation

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MLA
Chandrasekaran, Vigneshwaran, et al. “Nearly Blinking-Free, High-Purity Single-Photon Emission by Colloidal InP/ZnSe Quantum Dots.” NANO LETTERS, vol. 17, no. 10, 2017, pp. 6104–09.
APA
Chandrasekaran, V., Tessier, M., Dupont, D., Geiregat, P., Hens, Z., & Brainis, E. (2017). Nearly blinking-free, high-purity single-photon emission by colloidal InP/ZnSe quantum dots. NANO LETTERS, 17(10), 6104–6109.
Chicago author-date
Chandrasekaran, Vigneshwaran, Mickaël Tessier, Dorian Dupont, Pieter Geiregat, Zeger Hens, and Edouard Brainis. 2017. “Nearly Blinking-Free, High-Purity Single-Photon Emission by Colloidal InP/ZnSe Quantum Dots.” NANO LETTERS 17 (10): 6104–9.
Chicago author-date (all authors)
Chandrasekaran, Vigneshwaran, Mickaël Tessier, Dorian Dupont, Pieter Geiregat, Zeger Hens, and Edouard Brainis. 2017. “Nearly Blinking-Free, High-Purity Single-Photon Emission by Colloidal InP/ZnSe Quantum Dots.” NANO LETTERS 17 (10): 6104–6109.
Vancouver
1.
Chandrasekaran V, Tessier M, Dupont D, Geiregat P, Hens Z, Brainis E. Nearly blinking-free, high-purity single-photon emission by colloidal InP/ZnSe quantum dots. NANO LETTERS. 2017;17(10):6104–9.
IEEE
[1]
V. Chandrasekaran, M. Tessier, D. Dupont, P. Geiregat, Z. Hens, and E. Brainis, “Nearly blinking-free, high-purity single-photon emission by colloidal InP/ZnSe quantum dots,” NANO LETTERS, vol. 17, no. 10, pp. 6104–6109, 2017.
@article{8533348,
  abstract     = {Colloidal core/shell InP/ZnSe quantum dots (QDs), recently produced using an improved synthesis method, have a great potential in life-science applications as well as in integrated quantum photonics and quantum information processing as single-photon emitters. Single particle spectroscopy of 10 nm QDs with 3.2 nm cores reveals strong photon antibunching attributed to fast (70 ps) Auger recombination of multiple excitons. The QDs exhibit very good photostability under strong optical excitation. We demonstrate that the antibunching is preserved when the QDs are excited above the saturation intensity of the fundamental-exciton transition. This result paves the way toward their usage as high-purity on-demand single-photon emitters at room temperature. Unconventionally, despite the strong Auger blockade mechanism, InP/ZnSe QDs also display very little luminescence intermittency ("blinking"), with a simple on/off blinking pattern. The analysis of single-particle luminescence statistics places these InP/ZnSe QDs in the class of nearly blinking free QDs, with emission stability comparable to state-of-the-art thick-shell and alloyed-interface CdSe/CdS, but with improved single-photon purity.},
  author       = {Chandrasekaran, Vigneshwaran and Tessier, Mickaël and Dupont, Dorian and Geiregat, Pieter and Hens, Zeger and Brainis, Edouard},
  issn         = {1530-6984},
  journal      = {NANO LETTERS},
  keywords     = {Colloidal quantum dots,single-particle,spectroscopy,single-photon emission,blinking,ROOM-TEMPERATURE,FLUORESCENCE INTERMITTENCY,SUPPRESSED BLINKING,AUGER RECOMBINATION,NANOCRYSTALS,GENERATION,LINEWIDTHS,INTERFACE,EFFICIENT,EMITTERS},
  language     = {eng},
  number       = {10},
  pages        = {6104--6109},
  title        = {Nearly blinking-free, high-purity single-photon emission by colloidal InP/ZnSe quantum dots},
  url          = {http://dx.doi.org/10.1021/acs.nanolett.7b02634},
  volume       = {17},
  year         = {2017},
}

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