Coherent generation of acoustic phonons in an optical microcavity

N. D. LANZILLOTTI-KIMURA, A. FAINSTEIN, A. HUYNH, B. PERRIN, B. JUSSERAND, A. MIARD, AND A. LEMAÎTRE

Paris, Francia

Conferencia; 12th International Conference on Phonon Scattering in Condensed Matter “Phonons 2007”; 2007

Coherent acoustic phonons confined in a nanocavity are generated in an optical microcavity. The confinement of the femtosecond light pulse in the optical resonator amplifies both processes, generation and detection of the acoustic phonons. In addition, due to the standing wave character of the photon field, phonons of wavevector q = 0 and q = 2k (k is the light wavenumber) contribute to both the generation and detection in time resolved reflectivity measurements, further optimizing the pump and probe experiments. Time resolved differential reflectivity experiments are reported as a function of laser energy. The optical cavity resonance is apparent in the amplitude and spectral features of the Fourier transformed signals.