title: Towards GHz-THz cavity optomechanics in DBR-based semiconductor resonators.
abstract: Resonators based on acoustic distributed Bragg reflectors (DBRs) were optimized to work in the GHz-THz regime, and grown by molecular beam epitaxy. We show that in structures made of GaAlAs alloys a simultaneous optimal confinement of light in the visible range and phonons in the tens of GHz range can be achieved. We report time resolved differential optical reflectivity experiments performed with fs-ps laser pulses. The experimental results are in excellent agreement with simulations based on standard transfer matrix methods. The resonant behavior of the photoelastic coefficient is discussed. The perfect optic-acoustic mode overlapping, added to a strongly enhanced coupling mechanism, implies that these DBR-based cavities could be the base of highly efficient optomechanical resonators.
authors: Laboratoire de Photonique et de Nanostructures, C.N.R.S., 91460 Marcoussis, France. Electronic address: daniel.kimura@lpn.cnrs.fr.
authors: N D
authors: ND
authors: Lanzillotti-Kimura
authors: Centro Atómico Bariloche & Instituto Balseiro, C.N.E.A., 8400 S.C. de Bariloche, R.N., Argentina. Electronic address: afains@cab.cnea.gov.ar.
authors: A
authors: A
authors: Fainstein
authors: Institut des NanoSciences de Paris, UMR 7588 C.N.R.S., Université Pierre et Marie Curie, 75015 Paris, France.
authors: B
authors: B
authors: Jusserand
keywords: Cavity optomechanics; Coherent phonon generation; Ps acoustics; Semiconductor devices