articleScienceFeb 22, 2019GREEN OA

Coherent single-photon emission from colloidal lead halide perovskite quantum dots

HUHendrik UtzatWSWeiwei SunAEAlexander E. K. KaplanFKFranziska KriegMGMatthias Ginterseder

Massachusetts Institute of Technology · ETH Zurich · +1 more institution

PubMed
Indexed inarxivcrossrefpubmed

Abstract

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…

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Authors

11
  • HU
    Hendrik UtzatCorresponding

    Massachusetts Institute of Technology

  • WS
    Weiwei Sun

    Massachusetts Institute of Technology

  • AE
    Alexander E. K. Kaplan

    Massachusetts Institute of Technology

  • FK
    Franziska Krieg

    ETH Zurich, Swiss Federal Laboratories for Materials Science and Technology

  • MG
    Matthias Ginterseder

    Massachusetts Institute of Technology

Topics & keywords

Topics
Keywords
  • Quantum dot
  • Halide
  • Photon
  • Perovskite (structure)
  • Coherence (philosophical gambling strategy)
  • Photonics
  • Nanophotonics
  • Semiconductor
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