Helmholtz Resonator Applied to Nanocrystal-Based Infrared Sensing

• DOI: 10.1021/acs.nanolett.2c02769
• Publication Date: 2022-10-03T16:46:00Z
• Authors: Claire Abadie; Laura Paggi; Alice Fabas; Adrien Khalili; Tung Huu Dang; Corentin Dabard; Mariarosa Cavallo; Rodolphe Alchaar; Huichen Zhang; Yoann Prado; Nathalie Bardou; Christophe Dupuis; Xiang Zhen Xu; Sandrine Ithurria; Debora Pierucci; James K. Utterback; Baptiste Fix; Grégory Vincent; Patrick Bouchon; Emmanuel Lhuillier
• Keywords: nanocrystal; Helmholtz resonator; infrared; photoconduction; [CHIM.MATE]Chemical Sciences/Material chemistry; 02 engineering and technology; [PHYS.COND]Physics [physics]/Condensed Matter [cond-mat]; 0210 nano-technology; photonic cavity; 7. Clean energy

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 shape absorption spectrum, tune directionality, and so on. Here, we explore a equivalent acoustic Helmholtz resonator propose design that can easily be fabricated. This geometry combines strong electromagnetic field magnification narrow channel width compatible with efficient charge conduction despite hopping conduction. At 80 K, device reaches responsivity above 1 A·W-1 detectivity 1011 Jones (3 μm cutoff) while offering significantly faster time-response than vertical diodes.