Loss-Driven Topological Transitions in Lasing
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2022-10-21
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en
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6
1-6
1-6
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Physical Review Letters, Volume 129, issue 17
Abstract
We experimentally observe lasing in a hexamer plasmonic lattice and find that, when tuning the scale of the unit cell, the polarization properties of the emission change. By a theoretical analysis, we identify the lasing modes as quasi-bound-states in continuum of topological charges of zero, one, or two. A T-matrix simulation of the structure reveals that the mode quality (Q) factors depend on the scale of the unit cell, with highest-Q modes favored by lasing. The system thus shows a loss-driven transition between lasing in modes of trivial and high-order topological charge.Description
Funding Information: We thank Javier Cuerda for useful discussions on the finite element method simulations. This work was supported by the Academy of Finland under Project No. 318937 (PROFI), the Academy of Finland Flagship Programme, Photonics Research and Innovation (PREIN), Project No. 320167, and by Centre for Quantum Engineering (CQE) at Aalto University. Part of the research was performed at the OtaNano Nanofab cleanroom (Micronova Nanofabrication Centre), supported by Aalto University. We acknowledge the computational resources provided by the Aalto Science-IT project. G. S. has received funding from the European Union’s Horizon 2020 research and innovation program under the Marie Skłodowska-Curie Grant Agreement No. 101025211 (TEBLA). | openaire: EC/H2020/101025211/EU//TEBLA
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Salerno, G, Heilmann, R, Arjas, K, Aronen, K, Martikainen, J P & Törmä, P 2022, ' Loss-Driven Topological Transitions in Lasing ', Physical Review Letters, vol. 129, no. 17, 173901, pp. 1-6 . https://doi.org/10.1103/PhysRevLett.129.173901
