Lasing in Ni Nanodisk Arrays

Sara Pourjamal, Tommi K. Hakala, Marek Nečada, Francisco Freire-Fernández, Mikko Kataja, Heikki Rekola, Jani Petri Martikainen, Päivi Törmä, Sebastiaan Van Dijken

Research output: Contribution to journalArticleScientificpeer-review

18 Citations (Scopus)
14 Downloads (Pure)


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.

Original languageEnglish
Pages (from-to)5686-5692
Number of pages7
JournalACS Nano
Issue number5
Publication statusPublished - 28 May 2019
Publication typeA1 Journal article-refereed


  • loss-compensated magnetoplasmonics
  • nanolasing
  • Ni nanodisk array
  • plasmonics
  • surface lattice resonance

Publication forum classification

  • Publication forum level 3

ASJC Scopus subject areas

  • General Materials Science
  • General Engineering
  • General Physics and Astronomy


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