title: Plasmonic grating as a nonlinear converter-coupler.
abstract: The paper introduces a wavelength converter composed of a metallic finite 2-dimensional particle grating on top of an optical waveguide. The particles sustain plasmonic resonances which will result in the near-field enhancement and therefore, high conversion efficiency. Due to near-field interaction of the grating field with the propagating modes of the waveguide, the generated third harmonic wave is phase-matched to a propagating mode of the waveguide, while the fundamental frequency component is not coupled into the output waveguide of the structure. The performance of this structure is numerically investigated using a full-wave transmission line method for the linear analysis and a three-dimensional finite-difference time-domain method for the nonlinear analysis.
authors.affiliation: Photonics Research Laboratory, Center of Excellence for Applied Electromagnetic Systems, School of Electrical and Computer Engineering, University of Tehran, Tehran, Iran. n.talebi@ece.ut.ac.ir
authors.forename: Nahid
authors.initials: N
authors.lastname: Talebi
authors.forename: Mahmoud
authors.initials: M
authors.lastname: Shahabadi
authors.forename: Worawut
authors.initials: W
authors.lastname: Khunsin
authors.forename: Ralf
authors.initials: R
authors.lastname: Vogelgesang
mesh_terms: D004574:Electromagnetic Fields; D006046:Gold / Q000737:chemistry*; D016014:Linear Models; D053768:Metal Nanoparticles; D017711:Nonlinear Dynamics; D020349:Surface Plasmon Resonance / Q000295:instrumentation* / Q000379:methods*
chemical_list: D006046:Gold