Plasmon-enhanced high operating temperature infrared photodetectors

Andrzej Janaszek; Piotr Wróbel; Rafał Kotyński; Maciej Dems; Ömer Ceylan; Yasar Gurbuz; Łukasz Kubiszyn; Józef Piotrowski

doi:10.1117/12.2665259

6 June 2023 Plasmon-enhanced high operating temperature infrared photodetectors

Andrzej Janaszek, Piotr Wróbel, Rafał Kotyński, Maciej Dems, Ömer Ceylan, Yasar Gurbuz, Łukasz Kubiszyn, Józef Piotrowski

Author Affiliations +

Proceedings Volume 12568, Metamaterials XIV; 125680R (2023) https://doi.org/10.1117/12.2665259
Event: SPIE Optics + Optoelectronics, 2023, Prague, Czech Republic

Abstract

Plasmonic enhancement has a great potential for performance improvement of high operating temperature (HOT) photodetectors, especially those optimized for long-wavelength infrared (LWIR). Conventional HOT photodetectors exhibit poor quantum efficiency (QE) due to short carrier diffusion lengths of narrow bandgap semiconductors and relatively low absorption coefficients within the LWIR range. Plasmon-driven subwavelength light confinement enables high absorption even in a very thin absorber that provides efficient carrier collection, boosting the detector QE. We propose a photovoltaic detector equipped with a two-dimensional subwavelength hole array (2DSHA) in gold metallization on InAs/InAsSb type-II superlattice (T2SL) heterostructure. Our numerical study utilizing the finite-difference time-domain (FDTD) method predicts five times increased absorption in comparison with a conventional, back-side illuminated device. The simulated behavior of the plasmonic structure was confirmed experimentally by transmittance measurements, which revealed resonant features corresponding to various plasmonic modes.

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Citation Download Citation

Andrzej Janaszek, Piotr Wróbel, Rafał Kotyński, Maciej Dems, Ömer Ceylan, Yasar Gurbuz, Łukasz Kubiszyn, and Józef Piotrowski "Plasmon-enhanced high operating temperature infrared photodetectors", Proc. SPIE 12568, Metamaterials XIV, 125680R (6 June 2023); https://doi.org/10.1117/12.2665259

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