17-22 July 2022
Royal Conservatory of Music, Toronto
America/Toronto timezone

Quasi-BIC mode lasing in a quadrumer plasmonic lattice

20 Jul 2022, 17:00
1h 30m
Hart House (Hart House)

Hart House

Hart House

7 Hart House Cir, Toronto, ON M5S 3H3
Poster presentation Quantum optics and hybrid quantum systems Poster session

Speaker

Grazia Salerno (Aalto University)

Description

Plasmonic lattices of metal nanoparticles have emerged as an effective platform for strong light-matter coupling, lasing, and Bose-Einstein condensation. However, the full potential of complex unit cell structures has not been ex- ploited. On the other hand, bound states in continuum (BICs) have attracted attention, as they provide topologically protected optical modes with diverging quality factors. Here, we show that quadrumer nanoparticle lattices enable lasing in a quasi-BIC mode with a highly out-of-plane character. By combining theory with polarization-resolved measurements of the emission, we show that the lasing mode has a topological charge. Our analysis reveals that the mode is primarily polarized out-of-plane as a result of the quadrumer structure. The quality factors of the out-of-plane BIC modes of the quadrumer array can be exceedingly high. Our results unveil the power of complex multi-particle unit cells in creating topologically protected high-Q modes in periodic nanostructures.

Presenter name Salerno Grazia

Primary authors

Rebecca Heilmann (Aalto University) Grazia Salerno (Aalto University) Javier Cuerda (Aalto University) Tommi K. Hakala (University of Eastern Finland) Päivi Törmä (Aalto University)

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