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This content will become publicly available on September 22, 2016

Title: Efficient nanosecond photoluminescence from infrared PbS quantum dots coupled to plasmonic nanoantennas

Infrared (IR) light sources with high modulation rates are critical components for on-chip optical communications. Lead-based colloidal quantum dots are promising nonepitaxial materials for use in IR light-emitting diodes, but their slow photoluminescence lifetime is a serious limitation. Here we demonstrate coupling of PbS quantum dots to colloidal plasmonic nanoantennas based on film-coupled metal nanocubes, resulting in a dramatic 1300-fold reduction in the emission lifetime from the microsecond to the nanosecond regime. This lifetime reduction is primarily due to a 1100-fold increase in the radiative decay rate owing to the high quantum yield (65%) of the antenna. The short emission lifetime is accompanied by high antenna quantum efficiency and directionality. Lastly, this nonepitaxial platform points toward GHz frequency, electrically modulated, telecommunication wavelength light-emitting diodes and single-photon sources.
Authors:
 [1] ;  [2] ;  [3] ;  [3] ;  [2] ;  [4]
  1. Duke Univ., Durham, NC (United States). Center for Metamaterials and Integrated Plasmonics and Dept. of Electrical and Computer Engineering
  2. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Dept. of Chemical Engineering
  3. Univ. of Nebraska, Lincoln, NE (United States). Dept. of Electrical and Computer Engineering
  4. Duke Univ., Durham, NC (United States). Center for Metamaterials and Integrated Plasmonics and Dept. of Electrical and Computer Engineering and Dept. of Physics
Publication Date:
OSTI Identifier:
1326111
Grant/Contract Number:
SC0001088
Type:
Published Article
Journal Name:
ACS Photonics
Additional Journal Information:
Journal Volume: 3; Journal Issue: 10; Journal ID: ISSN 2330-4022
Publisher:
American Chemical Society
Research Org:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; plasmonics; IR light sources; Purcell enhancement; quantum dots; nanoantenna; nanocube