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arXiv · 2512.05264

Plasmonic enhancement of the infrared radiation absorption in an ultrathin InSb layer

Yurii M. Lyaschuk·Vadym V. Korotyeyev·Viacheslav A. Kochelap·Oleksandr O. Raichev
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Abstract

Indium antimonide (InSb) is a fundamental material for infrared radiation detectors based on interband transitions. Its narrow bandgap enables detection of infrared radiation within the $3-5 \mu m$ atmospheric window, while its high quantum efficiency ensures excellent sensitivity in InSb-based detectors. We propose a plasmonic structure that significantly enhances infrared absorption in an ultrathin InSb film. The resonant characteristics of this plasmonic enhancement effect could serve as a foundation for developing highly sensitive multi-color detectors.

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Yurii M. Lyaschuk, Vadym V. Korotyeyev, Viacheslav A. Kochelap, Oleksandr O. Raichev. 2025-12-04. Plasmonic enhancement of the infrared radiation absorption in an ultrathin InSb layer. https://arxiv.org/abs/2512.05264

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