title: Self-induced optical modulation of the transmission through a high-Q silicon microdisk resonator.
abstract: Direct time-domain observations are reported of a low-power, self-induced modulation of the transmitted optical power through a high-Q silicon microdisk resonator. Above a threshold input power of 60 microW the transmission versus wavelength deviates from a simple optical bistability behavior, and the transmission intensity becomes highly oscillatory in nature. The transmission oscillations are seen to consist of a train of sharp transmission dips of width approximately 100 ns and period close to 1 micros. A model of the system is developed incorporating thermal and free-carrier dynamics, and is compared to the observed behavior. Good agreement is found, and the self-induced optical modulation is attributed to a nonlinear interaction between competing free-carrier and phonon populations within the microdisk.
authors.forename: Thomas J
authors.initials: TJ
authors.lastname: Johnson
authors.forename: Matthew
authors.initials: M
authors.lastname: Borselli
authors.forename: Oskar
authors.initials: O
authors.lastname: Painter