Helmholtz Resonator Applied to Nanocrystal-Based Infrared Sensing

While the integration of nanocrystals as an active medium for optoelectronic devices progresses, light management strategies are becoming required. Over recent years, several photonic structures (plasmons, cavities, mirrors, etc.) have been coupled to nanocrystal films to shape the absorption spectr...

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Bibliographic Details
Published in:Nano letters 2022-11, Vol.22 (21), p.8779-8785
Main Authors: Abadie, Claire, Paggi, Laura, Fabas, Alice, Khalili, Adrien, Dang, Tung Huu, Dabard, Corentin, Cavallo, Mariarosa, Alchaar, Rodolphe, Zhang, Huichen, Prado, Yoann, Bardou, Nathalie, Dupuis, Christophe, Xu, Xiang Zhen, Ithurria, Sandrine, Pierucci, Debora, Utterback, James K., Fix, Baptiste, Vincent, Grégory, Bouchon, Patrick, Lhuillier, Emmanuel
Format: Article
Language:English
Subjects:
Chemical Sciences
Condensed Matter
Material chemistry
Physics
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Summary:While the integration of nanocrystals as an active medium for optoelectronic devices progresses, light management strategies are becoming required. Over recent years, several photonic structures (plasmons, cavities, mirrors, etc.) have been coupled to nanocrystal films to shape the absorption spectrum, tune the directionality, and so on. Here, we explore a photonic equivalent of the acoustic Helmholtz resonator and propose a design that can easily be fabricated. This geometry combines a strong electromagnetic field magnification and a narrow channel width compatible with efficient charge conduction despite hopping conduction. At 80 K, the device reaches a responsivity above 1 A·W–1 and a detectivity above 1011 Jones (3 μm cutoff) while offering a significantly faster time-response than vertical geometry diodes.
ISSN:1530-6984
1530-6992
DOI:10.1021/acs.nanolett.2c02769