Design of a hybrid silicon-plasmonic co-propagating coupler operating close to coherent perfect absorption
Authors: Zanotto S., Melloni A.
Autors Affiliation: Politecn Milan, Dipartimento Elettron Informaz & Bioingn, Piazza Leonardo da Vinci 32, I-20133 Milan, Italy; Ist Nazl Ott CNR, Via Nello Carrara 1, I-50019 Sesto Fiorentino, FI, Italy; LENS, Via Nello Carrara 1, I-50019 Sesto Fiorentino, FI, Italy
Abstract: By hybrid integration of plasmonic and dielectric waveguide concepts, it is shown that nearly perfect coherent absorption can be achieved in a co-propagating coupler geometry. First, the operating principle of the proposed device is detailed in the context of a more general 2 x 2 lossy coupler formalism. Then, it is shown how to tune the device in a wide region of possible working points, its broadband operation, and the tolerance to fabrication uncertainties. Finally, a complete picture of the electromagnetic modes inside the hybrid structure is analyzed, shining light onto the potentials which the proposed device holds in view of classical and quantum signal processing, nonlinear optics, polarization control, and sensing. Published by AIP Publishing.
Journal/Review: JOURNAL OF APPLIED PHYSICS
Volume: 119 (16) Pages from: 163103-1 to: 163103-5
KeyWords: INTERFEROMETRIC CONTROL; BROAD-BAND; LIGHT; METAMATERIALS; GENERATION; MODULATORS; SWITCHES; GRAPHENEDOI: 10.1063/1.4947279Citations: 5data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2022-08-07References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here