Coherent generation of acoustic phonons in an optical microcavity

N. D. Lanzillotti Kimura (1) , A. Fainstein , Agnès Huynh (1) , Bernard Perrin (1) , Bernard Jusserand (1) , A. Miard (2) , A. Lemaitre (2)

1 INSP - Institut des Nanosciences de Paris
2 LPN - Laboratoire de photonique et de nanostructures

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.

Domaines: Autre [cond-mat.other]

N. D. Lanzillotti Kimura, A. Fainstein, Agnès Huynh, Bernard Perrin, Bernard Jusserand, et al.. Coherent generation of acoustic phonons in an optical microcavity. 12TH INTERNATIONAL CONFERENCE ON PHONON SCATTERING IN CONDENSED MATTER, Jul 2007, Paris, France. pp.012016, ⟨10.1088/1742-6596/92/1/012016⟩. ⟨hal-00418785⟩