Coherent single-photon emission from colloidal lead halide perovskite quantum dots
Name
1812.11923.pdf
Description
Submitted version
Size
4.98 MB
Format
Unknown
Checksum (MD5)
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Author(s)
Utzat, Hendrik
Sun, Weiwei
Kaplan, Alexander EK
Krieg, Franziska
Ginterseder, Matthias
Spokoyny, Boris
Klein, Nathan D.
Shulenberger, Katherine E.
Perkinson, Collin Fisher
Kovalenko, Maksym
Date Issued
2019
Journal
Science
Publisher
American Association for the Advancement of Science (AAAS)
Version
Original manuscript
Abstract
2017 © The Authors, some rights reserved. Chemically made colloidal semiconductor quantum dots have long been proposed as scalable and color-tunable single emitters in quantum optics, but they have typically suffered from prohibitively incoherent emission. We now demonstrate that individual colloidal lead halide perovskite quantum dots (PQDs) display highly efficient single-photon emission with optical coherence times as long as 80 picoseconds, an appreciable fraction of their 210-picosecond radiative lifetimes. These measurements suggest that PQDs should be explored as building blocks in sources of indistinguishable single photons and entangled photon pairs. Our results present a starting point for the rational design of lead halide perovskite–based quantum emitters that have fast emission, wide spectral tunability, and scalable production and that benefit from the hybrid integration with nanophotonic components that has been demonstrated for colloidal materials.
MIT Department
Massachusetts Institute of Technology. Department of Chemistry
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1126/SCIENCE.AAU7392
