title: Ultrafast Coherent Dynamics of a Photonic Crystal All-Optical Switch.
abstract: We present pump-probe measurements of an all-optical photonic crystal switch based on a nanocavity, resolving fast coherent temporal dynamics. The measurements demonstrate the importance of coherent effects typically neglected when considering nanocavity dynamics. In particular, we report the observation of an idler pulse and more than 10 dB parametric gain. The measurements are in good agreement with a theoretical model that ascribes the observation to oscillations of the free-carrier population in the nanocavity. The effect opens perspectives for the realization of new all-optical photonic crystal switches with unprecedented switching contrast.
authors.affiliation: DTU Fotonik, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark and IEF Institut d'Electronique Fondamentale, Université Paris-Sud, F 91405 Orsay, France.
authors.forename: Pierre
authors.initials: P
authors.lastname: Colman
authors.affiliation: DTU Fotonik, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark.
authors.forename: Per
authors.initials: P
authors.lastname: Lunnemann
authors.affiliation: DTU Fotonik, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark.
authors.forename: Yi
authors.initials: Y
authors.lastname: Yu
authors.affiliation: DTU Fotonik, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark.
authors.forename: Jesper
authors.initials: J
authors.lastname: Mørk