title: Numerical analysis of the coupling mechanism in long-range plasmonic couplers at 1.55 μm.
abstract: We study the coupling mechanism between a high refractive index contrast waveguide and a plasmonic thin-film waveguide in the IR range. We also propose a novel design of a vertical coupler based on loading the plasmonic waveguide with a high refractive index contrast medium on each side. We achieve a coupling efficiency and an insertion loss of about 95% and 0.2 dB, respectively, with a coupling length of only 2.85 μm at the working wavelength of 1.55 μm.
authors.affiliation: Dipartimento di Elettrotecnica ed Elettronica, Politecnico di Bari, via Re David 200, Bari 70125, Italy. g.magno@poliba.it
authors.forename: Giovanni
authors.initials: G
authors.lastname: Magno
authors.forename: Marco
authors.initials: M
authors.lastname: Grande
authors.forename: Vincenzo
authors.initials: V
authors.lastname: Petruzzelli
authors.forename: Antonella
authors.initials: A
authors.lastname: D'Orazio