Lasing in Ni Nanodisk Arrays
Loading...
Access rights
openAccess
URL
Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
This publication is imported from Aalto University research portal.
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
Other link related to publication (opens in new window)
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
Other link related to publication (opens in new window)
Date
2019-05-28
Department
Major/Subject
Mcode
Degree programme
Language
en
Pages
7
5686-5692
5686-5692
Series
ACS Nano, Volume 13, issue 5
Abstract
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.Description
Keywords
loss-compensated magnetoplasmonics, nanolasing, Ni nanodisk array, plasmonics, surface lattice resonance
Other note
Citation
Pourjamal, S, Hakala, T K, Nečada, M, Freire-Fernández, F, Kataja, M, Rekola, H, Martikainen, J P, Törmä, P & Van Dijken, S 2019, ' Lasing in Ni Nanodisk Arrays ', ACS Nano, vol. 13, no. 5, pp. 5686-5692 . https://doi.org/10.1021/acsnano.9b01006