Open AccessAbsorption profile modulation by means of 1D digital plasmonic gratings
Author(s) -
Pierfrancesco Zilio,
D. Sammito,
Gabriele Zacco,
Filippo Romanato
Publication year - 2010
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.18.019558
Subject(s) - optics , plasmon , materials science , silicon , surface plasmon polariton , absorption (acoustics) , modulation (music) , grating , surface plasmon , optoelectronics , coupled mode theory , polariton , substrate (aquarium) , refractive index , physics , oceanography , acoustics , geology
Optical simulations of 1D digital plasmonic gratings on a Silicon substrate are performed by means of the Finite Elements Method and a modal analysis. The different mechanisms of transmission of the light are elucidated. The absorption profile in Silicon can be modulated and controlled changing the geometry. Configuration maps allow to determine the different optical regimes. Surface Plasmon Polaritons and cavity-mode resonances are shown to be effectively exploitable to enhance NIR-light absorption in different shallower regions of the underlying Silicon.