Demonstration of multiple quantum interference and Fano resonance realization in far-field from plasmonic nanostructure in Er3+-doped tellurite glass

Lozano C G.; Silva O.B.; Ferri F.A.; Rivera V.A.G.; Marega E., Jr. · Scientific Reports (2022) · DOI: 10.1038/s41598-022-08858-x

Resumen

It is crucial to control the tuning and improve the emission of a quantum emitter at the nanoscale. We report multiple Fano resonances in metallic nanostructures on an Er3+-doped tellurite glass. Periodic nanoslits were fabricated with a focused gallium ion beam on a gold thin film deposited on the tellurite glass. Is proposed a coupling function with Fano line-shape form, and the asymmetric parameter q for each resonance wavelength in the 515 to 535 nm region was calculated. This asymmetric resonance effect is a consequence of the quantum interaction between the continuum state, generated in the nanostructure, and the Stark splits of the 2H11 / 2 state.

Instituciones: Universidad Nacional Mayor de San Marcos