Coherent single-photon emission from colloidal lead halide perovskite quantum dots
- 7 March 2019
- journal article
- research article
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 363 (6431), 1068-+
- https://doi.org/10.1126/science.aau7392
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.Keywords
Funding Information
- U.S. Department of Energy (DE-FG02-07ER46454)
- U.S. Department of Energy (DE-SC0001088)
- U.S. Department of Energy (DE-FG02-07ER46454)
- U.S. Department of Energy (DE-SC0001088)
- U.S. Department of Energy (DE-FG02-07ER46454)
- Swiss Federal Commission for Technology and Innovation. (CTI-No. 18614.1 PFNM-NM)
This publication has 28 references indexed in Scilit:
- Charge noise and spin noise in a semiconductor quantum deviceNature Physics, 2013
- Engineering the Spin–Flip Limited Exciton Dephasing in Colloidal CdSe/CdS Quantum DotsACS Nano, 2012
- Single photon emission from silicon-vacancy colour centres in chemical vapour deposition nano-diamonds on iridiumNew Journal of Physics, 2011
- Efficient coupling of photons to a single molecule and the observation of its resonance fluorescenceNature Physics, 2007
- Modeling coherence measurements on a spectrally diffusing single-photon emitterPhysical Review A, 2007
- Colloidal Quantum Dots in All-Dielectric High-Q Pillar MicrocavitiesNano Letters, 2007
- Voltage-Controlled Optics of a Quantum DotPhysical Review Letters, 2004
- Indistinguishable photons from a single-photon deviceNature, 2002
- Influence of Spectral Diffusion on the Line Shapes of Single CdSe Nanocrystallite Quantum DotsThe Journal of Physical Chemistry B, 1999
- Observation of the "Dark Exciton" in CdSe Quantum DotsPhysical Review Letters, 1995