title: Picosecond optically reconfigurable filters exploiting full free spectral range tuning of single ring and Vernier effect resonators.
abstract: We demonstrate that phase shifts larger than 2π can be induced by all-optical tuning in silicon waveguides of a few micrometers in length. By generating high concentrations of free carriers in the silicon employing absorption of ultrashort, ultraviolet laser pulses, the refractive index of silicon can be drastically reduced. As a result, the resonance wavelength of optical resonators can be freely tuned over the full free spectral range. This allows for active integrated optic devices that can be switched with GHz frequencies into any desired state by all-optical means.
authors.forename: Roman
authors.initials: R
authors.lastname: Bruck
authors.forename: Ben
authors.initials: B
authors.lastname: Mills
authors.forename: David J
authors.initials: DJ
authors.lastname: Thomson
authors.forename: Benedetto
authors.initials: B
authors.lastname: Troia
authors.forename: Vittorio M N
authors.initials: VM
authors.lastname: Passaro
authors.forename: Goran Z
authors.initials: GZ
authors.lastname: Mashanovich
authors.forename: Graham T
authors.initials: GT
authors.lastname: Reed
authors.forename: Otto L
authors.initials: OL
authors.lastname: Muskens