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arXiv · 2204.07117

A 5.7 THz GaN/AlGaN quantum cascade detector based on polar step quantum wells

Patrick Quach·Arnaud Jollivet·Andrey Babichev·Nathalie Isac·Martina Morassi·Aristide Lemaitre·Pavel Yunin·Eric Frayssinet·Philippe de Mierry·Mathieu Jeannin·Adel Bousseksou·Raffaele Colombelli·Maria Tchernycheva·Yvon Cordier·François Julien
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Abstract

We report on a GaN/AlGaN quantum cascade detector operating in the terahertz spectral range. The device was grown by metal organic chemical vapor deposition on a c-sapphire substrate and relies on polar GaN/AlGaN step quantum wells. The active region thickness is in micrometer range. The structural, electrical and optical investigations attest of high structural quality of the synthetized nitride material. The detector exhibits a peak photocurrent at 5.7 THz (23.6 meV) with a responsivity of 0.1 mA/W at 10 K under surface normal irradiation through a 10 um period grating. The photocurrent persists up to 20 K.

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Patrick Quach, Arnaud Jollivet, Andrey Babichev, Nathalie Isac, Martina Morassi, Aristide Lemaitre, Pavel Yunin, Eric Frayssinet, Philippe de Mierry, Mathieu Jeannin, Adel Bousseksou, Raffaele Colombelli, Maria Tchernycheva, Yvon Cordier, François Julien. 2022-04-14. A 5.7 THz GaN/AlGaN quantum cascade detector based on polar step quantum wells. https://doi.org/10.1063/5.0086641

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