期刊
ACS NANO
卷 13, 期 5, 页码 5686-5692出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.9b01006
关键词
plasmonics; nanolasing Ni nanodisk array; surface lattice resonance; loss-compensated magnetoplasmonics
类别
资金
- Academy of Finland [303351, 307419, 318987, 316857]
- European Research Council [ERC-2013-AdG-340748-CODE]
- Aalto Centre for Quantum Engineering
- Aalto University
- Academy of Finland (AKA) [318987, 318987] Funding Source: Academy of Finland (AKA)
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.
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