Efficient Nanosecond Photoluminescence from Infrared PbS Quantum Dots Coupled to Plasmonic Nanoantennas


Journal Article

© 2016 American Chemical Society. 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. This nonepitaxial platform points toward GHz frequency, electrically modulated, telecommunication wavelength light-emitting diodes and single-photon sources.

Full Text

Duke Authors

Cited Authors

  • Akselrod, GM; Weidman, MC; Li, Y; Argyropoulos, C; Tisdale, WA; Mikkelsen, MH

Published Date

  • October 19, 2016

Published In

Volume / Issue

  • 3 / 10

Start / End Page

  • 1741 - 1746

Electronic International Standard Serial Number (EISSN)

  • 2330-4022

Digital Object Identifier (DOI)

  • 10.1021/acsphotonics.6b00357

Citation Source

  • Scopus