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

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 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.

Authors:

Utzat, Hendrik ;

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• Search OSTI.GOV for ORCID "0000-0003-2901-0141"
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Sun, Weiwei ;

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• Search OSTI.GOV for ORCID "0000-0003-0719-4170"
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Kaplan, Alexander E. K. ;

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• Search OSTI.GOV for ORCID "0000-0003-2994-6134"
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Krieg, Franziska; Ginterseder, Matthias ;

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• Search OSTI.GOV for ORCID "0000-0002-3830-6238"
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Spokoyny, Boris ;

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• Search OSTI.GOV for ORCID "0000-0002-6627-881X"
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Klein, Nathan D.; Shulenberger, Katherine E.; Perkinson, Collin F. ;

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• Search OSTI.GOV for ORCID "0000-0002-5676-1998"
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Kovalenko, Maksym V. ;

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• Search OSTI.GOV for ORCID "0000-0002-6396-8938"
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Bawendi, Moungi G.

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• Search OSTI.GOV for ORCID "0000-0003-2220-4365"
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Publication Date:

2019-02-21

Research Org.:

Energy Frontier Research Centers (EFRC) (United States). Center for Excitonics (CE); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

Sponsoring Org.:

USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

OSTI Identifier:

1566720

DOE Contract Number:  

FG02-07ER46454; SC0001088

Resource Type:

Journal Article

Journal Name:

Science

Additional Journal Information:

Journal Volume: 363; Journal Issue: 6431; Journal ID: ISSN 0036-8075

Publisher:

AAAS

Country of Publication:

United States

Language:

English

Subject:

solar (photovoltaic), solid state lighting, photosynthesis (natural and artificial), charge transport, optics, synthesis (novel materials), synthesis (self-assembly), synthesis (scalable processing)