Abstract
In this study, we present and establish a gold surface plasmon polariton (SPP) GaAs photodetector that achieves high internal quantum efficiency (IQE). At a wavelength of 600 nm, the IQE with the SPP was 85%, while the IQE without the SPP was 42%, an enhancement of 43%. Also, at a wavelength of 675 nm, the IQE with SPP was 82%, whereas the IQE without SPP was 45%, which constitutes an increase of 37%. Such excellent performance is ascribed to the subwavelength scope of the optical power in the photoconductive-based gold SPP GaAs that provides high IQE. Moreover, the recombination of the SPP in the photodetector provides greater photocurrent and responsivity.
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Yousif, B., Abo-Elsoud, M.E.A. & Marouf, H. High-Performance Enhancement of a GaAs Photodetector Using a Plasmonic Grating. Plasmonics 15, 1377–1387 (2020). https://doi.org/10.1007/s11468-020-01142-6
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DOI: https://doi.org/10.1007/s11468-020-01142-6