Open AccessHybrid metal-organic nanocavity arrays for efficient light out-coupling
Author(s) -
Verena Kolb,
Jens Pflaum
Publication year - 2017
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.006678
Subject(s) - finite difference time domain method , materials science , plasmon , photoluminescence , optics , coupling (piping) , lithography , surface plasmon , exciton , purcell effect , optoelectronics , nanosphere lithography , spontaneous emission , fabrication , laser , physics , medicine , alternative medicine , pathology , metallurgy , quantum mechanics
The spatially and spectrally resolved photoluminescence (PL) of the archetypical molecular dye ZnPc in periodically ordered organic-silver nanocavities (NC) is investigated by confocal microscopy. The presented approach of long-range ordered pillar structures prepared by nanosphere lithography not only combines the advantages of nanopatterning and localized surface plasmon resonances (LSPR) to improve the light out-coupling efficiency in metal-organic hybrid assemblies, but allows for distinction between geometrical and plasmonic contributions to the PL enhancement, the latter supported by complementary finite-difference-time-domain (FDTD) simulations. Supplementary time-resolved optical measurements indicate exciton lifetime reduction by at least one order of magnitude to be the main mechanism for PL increase amongst the improvement of geometrical out-coupling.