TY - JOUR
T1 - Lasing in Ni Nanodisk Arrays
AU - Pourjamal, Sara
AU - Hakala, Tommi K.
AU - Nečada, Marek
AU - Freire-Fernández, Francisco
AU - Kataja, Mikko
AU - Rekola, Heikki
AU - Martikainen, Jani Petri
AU - Törmä, Päivi
AU - Van Dijken, Sebastiaan
PY - 2019/5/28
Y1 - 2019/5/28
N2 - We report on lasing at visible wavelengths in arrays of ferromagnetic Ni nanodisks overlaid with an organic gain medium. We demonstrate that by placing an organic gain material within the mode volume of the plasmonic nanoparticles both the radiative and, in particular, the high ohmic losses of Ni nanodisk resonances can be compensated. Under increasing pump fluence, the systems exhibit a transition from lattice-modified spontaneous emission to lasing, the latter being characterized by highly directional and sub-nanometer line width emission. By breaking the symmetry of the array, we observe tunable multimode lasing at two wavelengths corresponding to the particle periodicity along the two principal directions of the lattice. Our results are relevant for loss-compensated magnetoplasmonic devices and topological photonics.
AB - We report on lasing at visible wavelengths in arrays of ferromagnetic Ni nanodisks overlaid with an organic gain medium. We demonstrate that by placing an organic gain material within the mode volume of the plasmonic nanoparticles both the radiative and, in particular, the high ohmic losses of Ni nanodisk resonances can be compensated. Under increasing pump fluence, the systems exhibit a transition from lattice-modified spontaneous emission to lasing, the latter being characterized by highly directional and sub-nanometer line width emission. By breaking the symmetry of the array, we observe tunable multimode lasing at two wavelengths corresponding to the particle periodicity along the two principal directions of the lattice. Our results are relevant for loss-compensated magnetoplasmonic devices and topological photonics.
KW - loss-compensated magnetoplasmonics
KW - nanolasing
KW - Ni nanodisk array
KW - plasmonics
KW - surface lattice resonance
UR - http://www.scopus.com/inward/record.url?scp=85064967811&partnerID=8YFLogxK
U2 - 10.1021/acsnano.9b01006
DO - 10.1021/acsnano.9b01006
M3 - Article
AN - SCOPUS:85064967811
VL - 13
SP - 5686
EP - 5692
JO - ACS Nano
JF - ACS Nano
SN - 1936-0851
IS - 5
ER -