title: Enhancement and inhibition of coherent phonon emission of a Ni film in a BaTiO3/SrTiO3 cavity.
abstract: We report pump-probe time resolved reflectivity experiments in a hybrid air-Ni metal-BaTiO(3)/SrTiO(3) oxide mirror phonon cavity. We demonstrate that the generated coherent acoustic phonon spectra of the impulsively excited metallic film can be inhibited or enhanced in the phonon cavity with respect to a Ni film directly grown on a SrTiO(3) substrate. The experiments are compared with simulations that highlight the role of the phonon density of states in the coherent acoustic emission, extending concepts at the base of the optical Purcell effect to the field of phononics.
authors.affiliation: Centro Atómico Bariloche and Instituto Balseiro, CNEA, 8400 San Carlos de Bariloche, Rio Negro, Argentina.
authors.forename: N D
authors.initials: ND
authors.lastname: Lanzillotti-Kimura
authors.forename: A
authors.initials: A
authors.lastname: Fainstein
authors.forename: B
authors.initials: B
authors.lastname: Perrin
authors.forename: B
authors.initials: B
authors.lastname: Jusserand
authors.forename: A
authors.initials: A
authors.lastname: Soukiassian
authors.forename: X X
authors.initials: XX
authors.lastname: Xi
authors.forename: D G
authors.initials: DG
authors.lastname: Schlom