Genetic algorithm driven optimization of a guided mode resonator coupled to an infrared nanocrystal film - Archive ouverte HAL
Article Dans Une Revue Applied Physics Letters Année : 2024

Genetic algorithm driven optimization of a guided mode resonator coupled to an infrared nanocrystal film

Claire Abadie
Nicolas Ledos
Ye Mou
Erwan Bossavit
Huichen Zhang
Albin Colle
Tommaso Gemo
Adrien Khalili
Yoann Prado
Bruno Gallas
Mathieu Mivelle

Résumé

Nanocrystal (NC)-based devices suffer from a trade-off between absorption, pushing for thicker films, and charge conduction that is only efficient over a few NC sizes. Therefore, the design of detectors based on NCs strongly benefits from the introduction of optical resonators that engineer the light–matter coupling. Traditionally, the design of such a cavity relies on analytic scaling rules. However, the design becomes far more complex when multiple resonances are targeted, requiring alternative design strategies. In this study, we explore how infrared nanocrystals can be coupled to a guided mode resonator to achieve a broadband enhancement of absorption. A genetic algorithm is used to systematically investigate how geometric factors can be tuned to increase the absorption × bandwidth product. In comparison to the pristine film, a significant increase in absorption was demonstrated across the targeted spectral range (1–2.5 μm). The detector based on the design metasurface exhibited high detectivity (2 × 1010 Jones @ 200 K) and fast time response (18 ns).
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Dates et versions

hal-04752019 , version 1 (24-10-2024)

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Claire Abadie, Nicolas Ledos, Ye Mou, Mariarosa Cavallo, Erwan Bossavit, et al.. Genetic algorithm driven optimization of a guided mode resonator coupled to an infrared nanocrystal film. Applied Physics Letters, 2024, 125 (17), ⟨10.1063/5.0227684⟩. ⟨hal-04752019⟩
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