Dynamical optical tuning of the coherent phonon detection sensitivity in DBR-based GaAs optomechanical resonators

作者：Sesin P; Soubelet P; Villafane V; Bruchhausen A E; Jusserand B; Lemaitre A; Lanzillotti Kimura N D; Fainstein A

来源：Physical Review B, 2015, 92(7): 075307.

DOI：10.1103/PhysRevB.92.075307

We present a detailed time-resolved differential reflectivity study of the electronic and the coherent phonon generation response of a GaAs optical microcavity after resonant picosecond laser pulse excitation. A complex behavior is observed as a function of laser-cavity-mode detuning and incident power. The observed response is explained in terms of the large dynamical variations of the optical cavity-mode frequency induced by the ultrafast laser excitation, related to the optical modulation of the GaAs-spacer index of refraction due to photoexcited carriers. It is demonstrated that this effect leads to a strong optical dynamical tuning of the coherent phonon detection sensitivity of the device.

• 出版日期2015-8-11