Multiphysics modeling of a planar HgCdTe-based mid-wavelength infrared (MWIR) focal plane array with 3 um-wide pixels enlightens the role of surface plasmon-polaritons observed in gold nanorods arranged on its illuminated face. Simulations indicate that the proposed plasmonic detector, which employs a 1 um-thick absorber layer, exhibits a reduction of diffusive inter-pixel crosstalk by more than one order of magnitude with respect to more conventional, non-plasmonic detectors with a 5 um-thick absorber layer, without penalizing responsivity and achieving increased detectivity in the whole MWIR band by taking advantage of the absorber volume reduction.
Plasmon-enhanced light absorption in mid-wavelength infrared HgCdTe detectors / Vallone, M.; Tibaldi, A.; Hanna, S.; Wegmann, A.; Eich, D.; Figgemeier, H.; Bertazzi, F.; Ghione, G.; Goano, M.. - In: IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS. - ISSN 1077-260X. - STAMPA. - 28:2(2022), p. 3802310. [10.1109/JSTQE.2021.3111780]
Plasmon-enhanced light absorption in mid-wavelength infrared HgCdTe detectors
Vallone M.;Tibaldi A.;Bertazzi F.;Ghione G.;Goano M.
2022
Abstract
Multiphysics modeling of a planar HgCdTe-based mid-wavelength infrared (MWIR) focal plane array with 3 um-wide pixels enlightens the role of surface plasmon-polaritons observed in gold nanorods arranged on its illuminated face. Simulations indicate that the proposed plasmonic detector, which employs a 1 um-thick absorber layer, exhibits a reduction of diffusive inter-pixel crosstalk by more than one order of magnitude with respect to more conventional, non-plasmonic detectors with a 5 um-thick absorber layer, without penalizing responsivity and achieving increased detectivity in the whole MWIR band by taking advantage of the absorber volume reduction.File | Dimensione | Formato | |
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https://hdl.handle.net/11583/2930072