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

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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Publication Details

Journal
Applied Physics Letters
Published
2024-10-21
DOI
https://doi.org/10.1063/5.0227684
Primary Topic
Plasmonic and Surface Plasmon Research
Type
article
Field-Weighted Citation Impact
0.00

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article

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

Claire Abadie, Mariarosa Cavallo, Bruno Gallas, Emmanuel Lhuillier et al.
Applied Physics Letters
Plasmonic and Surface Plasmon Research
article

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

Claire Abadie, Mariarosa Cavallo, Bruno Gallas, Emmanuel Lhuillier, Mathieu Mivelle, Adrien Khalili, Erwan Bossavit, Grégory Vincent, Ye Mou, Yoann Prado, Huichen Zhang, Nicolas Ledos, Tommaso Gemo, Albin Colle
article en

Abstract

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).

Applied Physics LettersVol. 125(17)
Centre National de la Recherche Scientifique (FR), Université Paris-Saclay (FR), Sorbonne Université (FR), Institut des NanoSciences de Paris (FR), Université Paris 1 Panthéon-Sorbonne (FR)
Agence Nationale de la Recherche, European Research Council
Openalex Percentile: Top 83%
Plasmonic and Surface Plasmon Research
DOIOpen Access PDFOpenAlex
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