title: Resonance pacemakers in excitable media.
abstract: Chemical waves are initiated in an excitable medium by resonance with local periodic forcing of the excitability. Experiments are carried out with a photosensitive Belousov-Zhabotinsky medium, in which the excitability is varied according to the intensity of the imposed illumination. Complex resonance patterns are exhibited as a function of the amplitude and frequency of the forcing. Local resonance-induced wave initiation transforms the medium globally from a quiescent excitable steady state to a periodic state of successive traveling waves.
authors.affiliation: Department of Chemistry, West Virginia University, Morgantown, West Virginia 26506-6045, USA.
authors.forename: Tabitha Ruvarashe
authors.initials: TR
authors.lastname: Chigwada
authors.forename: P
authors.initials: P
authors.lastname: Parmananda
authors.forename: Kenneth
authors.initials: K
authors.lastname: Showalter