Phase control of plasmon enhanced two-photon photoluminescence in resonant gold nanoantennas
Journal article, 2018
Plasmonic nanoantennas emit two-photon photoluminescence, which is much stronger than their second harmonic generation. Unfortunately, luminescence is an incoherent process and therefore generally not explored for nanoscale coherent control of the antenna response. Here, we demonstrate that, in resonant gold nanoantennas, the two-photon absorption process can be coherent, provided that the excitation pulse duration is shorter than the dephasing time of plasmon mode oscillation. Exploiting this coherent response, we show the pure spectral phase control of resonant gold nanoantennas, with effective read-out of the two-photon photoluminescence.
Author
Vikas Remesh
Barcelona Institute of Science and Technology (BIST)
Michael Stührenberg
Chalmers, Physics, Bionanophotonics
Lisa Saemisch
Barcelona Institute of Science and Technology (BIST)
Nicolò Accanto
Barcelona Institute of Science and Technology (BIST)
Paris Descartes University
Niek F. Van Hulst
Barcelona Institute of Science and Technology (BIST)
Catalan Institution for Research and Advanced Studies
Applied Physics Letters
0003-6951 (ISSN) 1077-3118 (eISSN)
Vol. 113 21 211101Subject Categories
Atom and Molecular Physics and Optics
Other Physics Topics
Other Electrical Engineering, Electronic Engineering, Information Engineering
DOI
10.1063/1.5051381