Lasing at K Points of a Honeycomb Plasmonic Lattice

We study lasing at the high-symmetry points of the Brillouin zone in a honeycomb plasmonic lattice. We use symmetry arguments to define singlet and doublet modes at the K points of the reciprocal space. We experimentally demonstrate lasing at the K points that is based on plasmonic lattice modes and...

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Bibliographic Details
Published in:Physical review letters 2019-01, Vol.122 (1), p.013901-013901, Article 013901
Main Authors: Guo, R, Nečada, M, Hakala, T K, Väkeväinen, A I, Törmä, P
Format: Article
Language:English
Subjects:
Brillouin zones
Feedback
Honeycomb construction
Lasing
Lattice vibration
Symmetry
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Summary:We study lasing at the high-symmetry points of the Brillouin zone in a honeycomb plasmonic lattice. We use symmetry arguments to define singlet and doublet modes at the K points of the reciprocal space. We experimentally demonstrate lasing at the K points that is based on plasmonic lattice modes and two-dimensional feedback. By comparing polarization properties to T-matrix simulations, we identify the lasing mode as one of the singlets with an energy minimum at the K point enabling feedback. Our results offer prospects for studies of topological lasing in radiatively coupled systems.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.122.013901