title: All-plasmonic modulation via stimulated emission of copropagating surface plasmon polaritons on a substrate with gain.
abstract: We experimentally demonstrate suppressed absorption and stimulated emission of surface plasmon polaritons (SPP) leading to all-plasmonic modulation of an SPP signal propagating at the interface between a metal and a gain medium; these observations are supported by the developed theory. The use of copropagating signal and control waves can provide more than 10 times more efficient SPP stimulated emission compared to out-of-plane pumping and opens up the possibility to realize integratable plasmonic components for active nanophotonic circuitry.
authors.affiliation: Nano-optics and Near-field Spectroscopy Group, Department of Physics, King's College London, Strand, London WC2R 2LS, United Kingdom. alexey.krasavin@kcl.ac.uk
authors.forename: Alexey V
authors.initials: AV
authors.lastname: Krasavin
authors.forename: Thanh Phong
authors.initials: TP
authors.lastname: Vo
authors.forename: Wayne
authors.initials: W
authors.lastname: Dickson
authors.forename: Pádraig M
authors.initials: PM
authors.lastname: Bolger
authors.forename: Anatoly V
authors.initials: AV
authors.lastname: Zayats
mesh_terms: D017607:Aluminum Compounds / Q000737:chemistry*; D004871:Erbium / Q000737:chemistry*; D005898:Glass / Q000737:chemistry; D006046:Gold / Q000737:chemistry*; D008567:Membranes, Artificial; D010710:Phosphates / Q000737:chemistry*; D020349:Surface Plasmon Resonance / Q000295:instrumentation*; D013499:Surface Properties
chemical_list: D017607:Aluminum Compounds; D008567:Membranes, Artificial; D010710:Phosphates; D006046:Gold; D004871:Erbium; C012714:aluminum phosphate