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Mid-infrared optical resonances in quantum dot photodetectors coupled with metallic gratings with different aperture diameters. / Yakimov, A. I.; Kirienko, V. V.; Bloshkin, A. A. и др.
в: Current Applied Physics, Том 20, № 7, 07.2020, стр. 877-882.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Mid-infrared optical resonances in quantum dot photodetectors coupled with metallic gratings with different aperture diameters
AU - Yakimov, A. I.
AU - Kirienko, V. V.
AU - Bloshkin, A. A.
AU - Dvurechenskii, A. V.
AU - Utkin, D. E.
N1 - Publisher Copyright: © 2020 Korean Physical Society Copyright: Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/7
Y1 - 2020/7
N2 - The paper is devoted to optical testing of mid-infrared Ge/Si photodetectors obtained by stacking of self-assembled Ge quantum dots in multilayer structures, which are near-field coupled to the adjacent nanoplasmonic arrays of subwavelength holes in metallic films. It is shown that photocurrent and near-field spectra consist of several sets of peaks, which are attributted to surface plasmon waves, localized surface plasmon modes or diffractive Rayleigh anomaly depending on the hole diameter and the angle of incidence θ. We find that for small holes the greatest contribution to the photocurrent enhancement is due to the excitation of the surface plasmon-polariton waves for all θ. As the hole diameter is increased and becomes comparable with the array periodicity, the normal-incident photoresponse improvement is provided by the Rayleigh anomaly. With the increase of incident angle, the photocurrent enhancement is supposed to arise from coupling of the localized shape resonance and propagating plasmon modes.
AB - The paper is devoted to optical testing of mid-infrared Ge/Si photodetectors obtained by stacking of self-assembled Ge quantum dots in multilayer structures, which are near-field coupled to the adjacent nanoplasmonic arrays of subwavelength holes in metallic films. It is shown that photocurrent and near-field spectra consist of several sets of peaks, which are attributted to surface plasmon waves, localized surface plasmon modes or diffractive Rayleigh anomaly depending on the hole diameter and the angle of incidence θ. We find that for small holes the greatest contribution to the photocurrent enhancement is due to the excitation of the surface plasmon-polariton waves for all θ. As the hole diameter is increased and becomes comparable with the array periodicity, the normal-incident photoresponse improvement is provided by the Rayleigh anomaly. With the increase of incident angle, the photocurrent enhancement is supposed to arise from coupling of the localized shape resonance and propagating plasmon modes.
KW - Mid-infrared detectors
KW - Quantum dots
KW - Subwavelength structures
KW - Surface plasmons
KW - TRANSMISSION
KW - ARRAYS
UR - http://www.scopus.com/inward/record.url?scp=85084379185&partnerID=8YFLogxK
U2 - 10.1016/j.cap.2020.04.009
DO - 10.1016/j.cap.2020.04.009
M3 - Article
AN - SCOPUS:85084379185
VL - 20
SP - 877
EP - 882
JO - Current Applied Physics
JF - Current Applied Physics
SN - 1567-1739
IS - 7
ER -
ID: 24260201