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How to Gain from Losses

Vortex laser emission at an on-demand tilted angle via Friedrich-Wintgen interference engineering

The research team iLum at INL has theoretically proposed and experimentally demonstrated a novel mechanism to control destructive interference between different radiative loss channels in resonant periodic metasurfaces. This results in the formation of topological singularities in the radiation field, known as Bound States in the Continuum, at “on-demand” locations in momentum space. By incorporating gain materials, specifically hybrid perovskites, into the design, they successfully demonstrate vortex beam lasing at tailored emission angles. Recently published in Nano Letters, this pioneering work holds the potential to transform the dynamic control of vortex beam lasing, with applications in optical manipulation, particle trapping, and free-space communication.

Contact: Hai Son Nguyen

References: “Taming Friedrich–Wintgen Interference in a Resonant Metasurface: Vortex Laser Emitting at an On-Demand Tilted Angle”
Raphael Mermet-Lyaudoz, Clémentine Symonds, Florian Berry, Emmanuel Drouard, Céline Chevalier, Gaëlle Trippé-Allard, Emmanuelle Deleporte, Joel Bellessa, Christian Seassal, and Hai Son Nguyen

Nano Letters (2023)
https://doi.org/10.1021/acs.nanolett.2c04936

Collaborations: Le Laboratoire Lumière, Matière et Interfaces (LuMin), ENS Paris-Saclay, Instiut Lumière Matière(ILM), Université Claude Bernard Lyon 1

Émission laser à grandes angles d'une métasurface à base de pérovskite. La texture de polarisation de chaque faisceau correspond à un vortex localisé à une singularité topologique du champ de rayonnement. Lasing emission at high-tilted angles from a perovskite-based metasurface. The polarization texture of each beam corresponds to a quantized vortex that is pinned at a topological singularity of the radiation field.