TY  - SER
AU  - Kirienko,V.V.
AU  - Bloshkin,Aleksei A.
AU  - Dvurechenskii,Anatolii V.
AU  - Utkin,Dmitrii E.
AU  - Yakimov,Andrew I.
TI  - Mid-infrared optical resonances in quantum dot photodetectors coupled with metallic gratings with different aperture diameters
KW  - детекторы
KW  - инфракрасный диапазон
KW  - поверхностные плазмоны
KW  - квантовые точки
KW  - субволновые структуры
KW  - статьи в журналах
N1  - Библиогр.: 39 назв
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 plasmonpolariton
 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
UR  - http://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000794387
ER  -