Focal Plane Array Based on HgTe Nanocrystals with Photovoltaic Operation in the Short-Wave Infrared - Archive ouverte HAL Access content directly
Journal Articles Applied Physics Letters Year : 2023

Focal Plane Array Based on HgTe Nanocrystals with Photovoltaic Operation in the Short-Wave Infrared

Nicolas Ledos
Tung Huu Dang
Erwan Bossavit
Huichen Zhang
Yoann Prado
Victor Parahyba

Abstract

Thanks to their remarkable spectral tunability across the entire infrared range, HgTe nanocrystals present a unique platform for designing infrared optoelectronic devices. While in recent years, most of the significant advances in this domain have been made on devices at the singlepixel level, there is a growing trend toward exploring the potential of this material for imaging applications. However, until recently, focal plane arrays based on HgTe NCs have been limited to the photoconductive mode, which is inherently associated with a large dark current. In this work, we demonstrate a diode stack compatible with a read-out integrated circuit whose back-end processing has been optimized to ensure compatibility with a complete diode stack deposition. The diode design is also optimized to generate a Fabry-Perot cavity in which 50 % of the light is effectively absorbed at the band edge. Finally, taking benefit from the full VGA format, high-resolution images are taken.
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hal-04183457 , version 1 (19-08-2023)

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Rodolphe Alchaar, Adrien Khalili, Nicolas Ledos, Tung Huu Dang, Maxime Lebreton, et al.. Focal Plane Array Based on HgTe Nanocrystals with Photovoltaic Operation in the Short-Wave Infrared. Applied Physics Letters, 2023, 123 (5), pp.051108. ⟨10.1063/5.0157348⟩. ⟨hal-04183457⟩
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