title: Enhancing four-wave-mixing processes by nanowire arrays coupled to a gold film.
abstract: We consider the process of four-wave mixing in an array of gold nanowires strongly coupled to a gold film. Using full-wave simulations, we perform a quantitative comparison of the four-wave mixing efficiency associated with a bare film and films with nanowire arrays. We find that the strongly localized surface plasmon resonances of the coupled nanowires provide an additional local field enhancement that, along with the delocalized surface plasmon of the film, produces an overall four-wave mixing efficiency enhancement of up to six orders of magnitude over that of the bare film. The enhancement occurs over a wide range of excitation angles. The film-coupled nanowire array is easily amenable to nanofabrication, and could find application as an ultra-compact component for integrated photonic and quantum optic systems.
authors.affiliation: Center for Metamaterials and Integrated Plasmonics, Electrical and Computer Engineering, Duke University, Durham, NC 27708, USA. ekaterina.poutrina@duke.edu
authors.forename: Ekaterina
authors.initials: E
authors.lastname: Poutrina
authors.forename: Cristian
authors.initials: C
authors.lastname: Ciracì
authors.forename: Daniel J
authors.initials: DJ
authors.lastname: Gauthier
authors.forename: David R
authors.initials: DR
authors.lastname: Smith
mesh_terms: D000465:Algorithms; D015374:Biosensing Techniques; D004867:Equipment Design; D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D036103:Nanotechnology / Q000379:methods*; D053770:Nanowires; D017711:Nonlinear Dynamics; D055095:Optics and Photonics; D011789:Quantum Theory; D020349:Surface Plasmon Resonance
chemical_list: D006046:Gold