Work

Light amplification by active metamirrors

Year: 2025

Type: article

Abstract: We consider a scheme of a thin film deposited on periodically modulated amplifying materials. We demonstrate that the reflection from such a metainterface can undergo amplification due to Fano resonances in the film. The amplification increases when the film waveguiding modes approach the edge of the continuum and degenerate into the leaky surface modes, guided by a thin film. Such modes possess a strong evanescent tail that extends into the active substrate and are therefore amplified. The study is performed by simplified analytical models, as well as by rigorous coupled wave analysis.

Source: Physical Review A

DOI: 10.1103/wg62-zt6d

Authors: Ignas Lukosiunas, Kestutis Staliunas

Institutions: Vilnius University, Institució Catalana de Recerca i Estudis Avançats, Universitat Politècnica de Catalunya

Language: English

Topic: Metamaterials and Metasurfaces Applications

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: green

Funders: Ministerio de Ciencia, Innovación y Universidades, Lietuvos Mokslo Taryba, Ministerio de Ciencia e Innovación

Awards: Dirbtinis fazinis sinchronizmas trijų bangų netiesiniam maišymui, G6529136777, G8796142472, G8920660035