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Vol. 32, No. 8(2), S&M2292

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Sensors and Materials
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Sensors and Materials, Volume 36, Number 6(1) (2024)
Copyright(C) MYU K.K.
pp. 2183-2197
S&M3661 Research Paper
https://doi.org/10.18494/SAM4997
Published: June 4, 2024

Indium Gallium Arsenide/Gallium Arsenide Antimonide Type Ⅱ Superlattice Photodetector That Can Utilize Night Airglow [PDF]

Masatoshi Koyama, Junichi Kudo, Yasuhiro Iguchi, Hiroshi Inada, Yasuhiro Muramatsu, Isamu Kumihashi, and Masahiro Sano

(Received January 24, 2024; Accepted April 30, 2024)

Keywords: type Ⅱ superlattice, infrared photodetector, night airglow, short-wavelength infrared

Since 2016, we have worked on the development of short-wavelength infrared (SWIR) type Ⅱ superlattice (T2SL) photodetectors that can utilize night airglow. In addition to the normal SWIR band, the photodetector can detect wavelengths longer than 1.7 μm, which indium gallium arsenide sensors cannot detect, and can effectively utilize illumination by atmospheric phenomena, often called night airglow. To confirm its technical feasibility, we fabricated T2SL single-pixel pin-photodiode experimental samples based on the results of T2SL structural simulation. Using these samples, we obtained various data such as dark current density and spectral sensitivity. On the basis of the data, we considered the appropriate structural parameters and operating conditions of the SWIR T2SL photodetector. Finally, we fabricated a focal plane array with 640 × 512 pixels and confirmed that the photodetector can obtain clear images.

Corresponding author: Masatoshi Koyama


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Cite this article
Masatoshi Koyama, Junichi Kudo, Yasuhiro Iguchi, Hiroshi Inada, Yasuhiro Muramatsu, Isamu Kumihashi, and Masahiro Sano, Indium Gallium Arsenide/Gallium Arsenide Antimonide Type Ⅱ Superlattice Photodetector That Can Utilize Night Airglow, Sens. Mater., Vol. 36, No. 6, 2024, p. 2183-2197.



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