Lasing Action from Anapole Metasurfaces

Nano Lett. 2021 Aug 11;21(15):6563-6568. doi: 10.1021/acs.nanolett.1c01857. Epub 2021 Jul 20.


We study active dielectric metasurfaces composed of two-dimensional arrays of split-nanodisk resonators fabricated in InGaAsP membranes with embedded quantum wells. Depending on the geometric parameters, such split-nanodisk resonators can operate in the optical anapole regime originating from an overlap of the electric dipole and toroidal dipole Mie-resonant optical modes, thus supporting strongly localized fields and high-Q resonances. We demonstrate room-temperature lasing from the anapole lattices of engineered active metasurfaces with low threshold and high coherence.

Keywords: Anapole; high-index nanoparticle; multipole decomposition; nanolaser; split-nanodisk resonator.