Lasing Action from Anapole Metasurfaces.
basic_science · Level V
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- Record sourced from PubMed, PMID 34282919.
- Also identified by DOI 10.1021/acs.nanolett.1c01857.
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Abstract
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-<i>Q</i> resonances. We demonstrate room-temperature lasing from the anapole lattices of engineered active metasurfaces with low threshold and high coherence.