TY - JOUR
T1 - Ultrafast spontaneous emission source using plasmonic nanoantennas
AU - Hoang, Thang B.
AU - Akselrod, Gleb M.
AU - Argyropoulos, Christos
AU - Huang, Jiani
AU - Smith, David R.
AU - Mikkelsen, Maiken H.
N1 - Funding Information:
This work was supported by a Ralph E. Powe Junior Faculty Enhancement Award, the Lord Foundation of North Carolina and the Air Force Office of Scientific Research Young Investigator Research Program (AFOSR, Grant. No. FA9550-15-1-0301). G.M.A. acknowledges support from the Intelligence Community Postdoctoral Research Fellowship Program. C.A. and D.R.S. acknowledge support from the Air Force Office of Scientific Research (AFOSR, Grant No. FA9550-12-1-0491).
Publisher Copyright:
© 2015, Macmillan Publishers Limited. All rights reserved.
PY - 2015/7/27
Y1 - 2015/7/27
N2 - Typical emitters such as molecules, quantum dots and semiconductor quantum wells have slow spontaneous emission with lifetimes of 1-10ns, creating a mismatch with high-speed nanoscale optoelectronic devices such as light-emitting diodes, single-photon sources and lasers. Here we experimentally demonstrate an ultrafast (<11ps) yet efficient source of spontaneous emission, corresponding to an emission rate exceeding 90GHz, using a hybrid structure of single plasmonic nanopatch antennas coupled to colloidal quantum dots. The antennas consist of silver nanocubes coupled to a gold film separated by a thin polymer spacer layer and colloidal core-shell quantum dots, a stable and technologically relevant emitter. We show an increase in the spontaneous emission rate of a factor of 880 and simultaneously a 2,300-fold enhancement in the total fluorescence intensity, which indicates a high radiative quantum efficiency of ∼50%. The nanopatch antenna geometry can be tuned from the visible to the near infrared, providing a promising approach for nanophotonics based on ultrafast spontaneous emission.
AB - Typical emitters such as molecules, quantum dots and semiconductor quantum wells have slow spontaneous emission with lifetimes of 1-10ns, creating a mismatch with high-speed nanoscale optoelectronic devices such as light-emitting diodes, single-photon sources and lasers. Here we experimentally demonstrate an ultrafast (<11ps) yet efficient source of spontaneous emission, corresponding to an emission rate exceeding 90GHz, using a hybrid structure of single plasmonic nanopatch antennas coupled to colloidal quantum dots. The antennas consist of silver nanocubes coupled to a gold film separated by a thin polymer spacer layer and colloidal core-shell quantum dots, a stable and technologically relevant emitter. We show an increase in the spontaneous emission rate of a factor of 880 and simultaneously a 2,300-fold enhancement in the total fluorescence intensity, which indicates a high radiative quantum efficiency of ∼50%. The nanopatch antenna geometry can be tuned from the visible to the near infrared, providing a promising approach for nanophotonics based on ultrafast spontaneous emission.
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U2 - 10.1038/ncomms8788
DO - 10.1038/ncomms8788
M3 - Article
AN - SCOPUS:84938408123
SN - 2041-1723
VL - 6
JO - Nature Communications
JF - Nature Communications
M1 - 7788
ER -