A1 Refereed original research article in a scientific journal
Magnetic on-off switching of a plasmonic laser
Authors: Freire-Fernández Francisco, Cuerda Javier, Daskalakis Konstantinos S., Perumbilavil Sreekanth, Martikainen Jani-Petri, Arjas Kristian, Törmä Päivi, van Dijken Sebastiaan
Publisher: NATURE PORTFOLIO
Publication year: 2022
Journal: Nature Photonics
Journal name in source: NATURE PHOTONICS
Journal acronym: NAT PHOTONICS
Volume: 16
Issue: 1
First page : 27
Last page: 32
Number of pages: 8
ISSN: 1749-4885
eISSN: 1749-4893
DOI: https://doi.org/10.1038/s41566-021-00922-8
Self-archived copy’s web address: https://research.utu.fi/converis/portal/detail/Publication/68486465
The nanoscale mode volumes of surface plasmon polaritons have enabled plasmonic lasers and condensates with ultrafast operation(1-4). Most plasmonic lasers are based on noble metals, rendering the optical mode structure inert to external fields. Here we demonstrate active magnetic-field control over lasing in a periodic array of Co/Pt multilayer nanodots immersed in an IR-140 dye solution. We exploit the magnetic nature of the nanoparticles combined with mode tailoring to control the lasing action. Under circularly polarized excitation, angle-resolved photoluminescence measurements reveal a transition between the lasing action and non-lasing emission as the nanodot magnetization is reversed. Our results introduce magnetization as a means of externally controlling plasmonic nanolasers, complementary to modulation by excitation(5), gain medium(6)(.7) or substrate(8). Further, the results show how the effects of magnetization on light that are inherently weak can be observed in the lasing regime, inspiring studies of topological photonics(9-11).
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