title: Characterization of optical nonlinearities in nanoporous silicon waveguides via pump-probe heterodyning technique.
abstract: The nonlinear response of nanoporous silicon optical waveguides is investigated using a novel pump-probe method. In this approach we use a two-frequency heterodyne technique to measure the pump-induced transient change in phase and intensity in a single measurement. We measure a 100 picosecond material response time and report behavior matching a physical model dominated by free-carrier effects significantly stronger than those observed in traditional silicon-based waveguides.
authors.forename: Ryan J
authors.initials: RJ
authors.lastname: Suess
authors.forename: Mohammad M
authors.initials: MM
authors.lastname: Jadidi
authors.forename: Kyowon
authors.initials: K
authors.lastname: Kim
authors.forename: Thomas E
authors.initials: TE
authors.lastname: Murphy