TY - JOUR
T1 - Loss-Driven Topological Transitions in Lasing
AU - Salerno, Grazia
AU - Heilmann, Rebecca
AU - Arjas, Kristian
AU - Aronen, Kerttu
AU - Martikainen, Jani Petri
AU - Törmä, Päivi
N1 - 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
PY - 2022/10/21
Y1 - 2022/10/21
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85141324230&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.129.173901
DO - 10.1103/PhysRevLett.129.173901
M3 - Article
C2 - 36332246
AN - SCOPUS:85141324230
SN - 0031-9007
VL - 129
SP - 1
EP - 6
JO - Physical Review Letters
JF - Physical Review Letters
IS - 17
M1 - 173901
ER -